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 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 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 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 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 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.