1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4237d320668fbd1554e0b2e81f9b9f09c57134ccddfa097daa98a02467dad494. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f975c54-056a-4717-98d3-7d091e89c5dd.json and https://artists.proofprofile.net/proofs/artist/5f975c54-056a-4717-98d3-7d091e89c5dd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e7bbde09218d6122a0313c4e41739ea0f9f084ba2afdb8cc1897bcd2f251b0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0801020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84ed3dc23e0adf58c11d2542e8ae32f9186cca46e5898e6c2b140f06c33adce. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0801030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fae576025d4c2d02bbb52f854f5496658d26b472e1ea1be7ed6ed627219775. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e4f3ecbd1ef40ebb829097cf3ba00324ce61172fe47a4fffd071235dc5ba8a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0801040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff592edbef3f4572ffab585cf2d8aa6f2eea09583a44261fdb85ff96a55f933c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0801060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce911b3978b261114cc72aef07e42853e1779467dc09e30a842ba104c31db722. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:49:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0801070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d023f97fd4d83e784d598ca30ea59b163adf1e3b3b292abfbb5a664c35b0f53. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0801080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130aeac3fdab87e912a77b49cb1a059872236a3212dcbd8cf0ea0480d9339b51. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0801100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2e9790e6dbd1f9511719d109f01feb8e20a948e0dba6fb8100d65838f0d304. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0801110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4846cc2e586ac58c5178935852e94c1fef4a2e220843f92fc777c9ff531c10b. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0801050.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94eaa528fe7369a71b4183af8df9fe3d41b2d92a44156ff4a82278763c134cf2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0801090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27908c611d8b66bb5235389bb85a6365ef84ac1a3a26549d23ef063b6b206efa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cd032f06b61868bd0b51177a3072618da7a3ea47e500dff6d876398e18ffd2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c8ec20606ab7a54baf42845e2405a632e362d17781751d9aae112e4dfde82f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41231e5460d6a7f07e85656cb21b7d3147f8b17219dd5880735f91fa05c9c932. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3253faaf231c1ca29f5125dea2351799b1ce610a03074ef05b16e2d75e90a23f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0301050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1710b869cedc71d53ff60920b98fb56e40a62b5d3f5387e9e590c109dea1053c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0301060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5c6b02f314f701a5f7d48f58fe6da089b8e690b6f93655a6f844940427347c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0301070.
Stomp og Vatn (Kåt og Galen frå Setesdalen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad8f6acbe553c44529c2d9a6730f96f39b9531833e5557665384e2af870d23c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0301080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48bf250cc3763c1e41951ceb9ad3f36d79a33008ebbbeb60459dd4fb9b6ba76. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0301090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b40076a71326c49b9eceddd0879f1be17201f00ad48310c633598675f505bbe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0301100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb573d7776658182f82b5c91137220601292cf63480b0e131d39e86b41eecc1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV0301110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5892f4ba3cdebf531d63f64c24f6ff2a7c5cac7f5899bde5a75316e8cdb2b479. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV1701010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39be40ef31d224cc1c6ccdfb86d17b6359eb95dbab8842ee3fc6ea4471bbdfce. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV1003010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb463acef5f52c84c3f0c2baa3bb2bec1add9b9ebfcb6bc538bb466abe073846a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCAV1003020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d465964a0ccdc3464d1d484fea25813c8a7345242b1cb3e8f0a8135979a1fb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOGTA1710130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c11e7986558afcab42b7565019ed368ff0910c89defb35bd639f58e9763c75. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOGTA1710140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5226ea31dfaadd81dd77107086843049b5c76df64f51a1331a59aa2cb19fe8. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOGTA1710120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1a897233bb06c696adc41506e77e55c5a4cbc2226ada71d57f71ce86bb9fad. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NODGC2101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb5ad77337c288f95029f1b58b0ca1d61282ef9cfd02ad85603cf017f59f2f6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NODGC2101020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a70c3ea4c1eb970870ce5f7980826963feb3fbc91055f12f75e505695a33b9a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NODGC2101401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58861209981178db2f102af5ac52385c06fa2e714f25cb497b22eb2e1151cd49. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NODGC2101070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b02b22b81f7b9e18a86b6b718b196df38291081004bf09efa9c74c77260cd03. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NODGC2101080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190431eb7bcbc7c6fc190efeb84230ec1340c8361e7d046718a0c6c9d8414596. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NODGC2101090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b2abc99ae57f510b2b3ae6ef0f817712b8bd30b56a6a97cc675cbaf07328f3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NODGC2101102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d68ff3a823fef62daceb91c0135c7d99e327f71b2f3b13adfedd4f021e117a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NODGC2101110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bfaa41043554a1c827235016b120c892792e9396cfb8a5ee71640b6be80642. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NODGC2101120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262d1c96c848cc6786cf02074feea7fbd8bcf8cafb995098627116b8a1ff4199. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NODGC2101143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298da37619a925022f8501fdd497891c0850a6f39b8ca2cc4b6bbb390990d620. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NODGC2101180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dab2afd5e3b85acff4b8de4313e39cfe32746a0d3533e87605e1ca561218cf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NODGC2101190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b45cf52fc550d5e51de9df79d7fcf45ea74ef11d891fa5e581e2375b235b25. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NODGC2101204.