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 0x73e085be9b90c9a979c35c52300fe9eafe3c1066b696941b543ff6baaf5da561. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cac414e-0262-49b9-b629-4631cacdcff9.json and https://artists.proofprofile.net/proofs/artist/9cac414e-0262-49b9-b629-4631cacdcff9.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 0x69b442d825334db60e0bb0ce64186b2ae45b0ffb1f376c76ccb40326b85a4cc0. 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/US66W2400347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224a81f54b6cd894995901133b254dfad217147f47cbbd5d7c8a9b9679c79f4e. 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/US66W2400348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d56e8843db2a450326a7152ff8db5a9edb7f88f7e52fab6062786962321865. 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/US66W2400185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855a724717b38f6ff09a9bf811ed89716c20e7dce1631fcdff1d9689da5e29d5. 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/US66W2400186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb591d0ad3d32e2fe00960b4d6608c8c9ce5f10042b9e616cc74e66a7824be178. 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/US92U1910966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33082d1031b58d1e77d7f8521c12eef596b0119cc06739093a8a7f132f1ef9c9. 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/US66W2300958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81772cde480b8aa5bbab14ee8e4448e9dac4bef64de54c70fc539e69ef673917. 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/US66W2300959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2423efe72bbcc38459bae19d84fbe307031ed6c85689b9b64b078b53e4ecbf6f. 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/US66W2300852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1b16c03c8177ee1d1bdc9cc845073bf29fbf90d59f2f8b23f5247390049280. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/US66W2300853.
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 0x68986def98ae434cf414b3d0899e1196ef00ba34465d178200caf9d225b5925b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US66W2300677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc119903ddf6b6c4e6061177ac2ea6e509b55c2c9bde052aac701edfa490ce488. 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/US66W2300678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca38b688be59c1ca1ceef43e0e9153f288b6fc0a1445ae8b1e3e5bdab10ed1af. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:05:36Z), 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/US66W2300492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebb9ded504745420115d7fdb915de3d8a696f1afd8a550f6389c673d9c1dfca. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/US66W2300491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14e98226383b25d0fa396937665789a8108f307f16b1b4597726c30ec86729d. 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/US66W2300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45490532b3bab233e69383ad97aa271756052b619d0e9e36ba935da37c096cb3. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/US66W2300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecc253b435d39a7efbc5b61a9a2ffa60f3885d914cd191a784772d706f0a58f. 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/US66W2201967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615c0e2a03e9d3ccdfebd06ac810348f7e296a6ec9cb3490622c9936bd0e791c. 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/US66W2201968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b523e6d2b3f392b30d3994340c2b3e7fb64bf354dfa35da288d78c91cba8bd4. 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/US66W2201700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60d2bfeac202e848d101ec67a7fad91eefb9366deb89b8ffa992f2343634366. 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/US66W2201701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2026c2ff32b181599d7ec064f022c036fcd095f20b997f018b0f13343681ba11. 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/US66W2201619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9512d2e9e5b68af06fb10c908e20601fb7b972e92b6b8fff5c2cbc73e145b37. 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/US66W2201620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f48046af9f8bc92fb3a3c23674da7e7d624c0c0bbd6a92e5a41650ae8d9fb5. 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/US66W2201293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6abc6cffbdc774e9f7b5d57e0c9fbf9990b8282ea6e4ecf1dee78000195d6c0. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/US66W2201294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63b9755c20b0bb7fd50a14b8d5f124d1ea741fc2b282232084f1550a38cd982. 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/US66W2200863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b20908c0edd25d383ca264efb20f6666b1a139b5ef36db346ad47722881079. 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/US66W2200864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1caeb0a108c9a6881deb10933c278fa2a8ed798f9b9125c769dbd2a02a87cd20. 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/US66W2200762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3198ec3e14f089f061e1cca6bf11d7682c1a4395150f7ff3e914a017b14fd5. 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/US66W2200763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e0b292a09a873d42a3c56ce4654095c7c944b527a364867db298bc915faa97. 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/US66W2200541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537a1e8404e5f386ca87904e72e823476bb36e3ea20fbac0ce218ccb84cbe34d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US66W2200542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18132f0d2b41b6d474f36fbcb3c8b26e9b3a5171c6e2fbe7d8625cd93285b8b5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US66W2200540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ac69aa09262d9e37351dfaac9f0d7c6bbd0c9d36204e8e96aa7cf8a7d2f9d0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:10:28Z), 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/US66W2200539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f08ba827472fa326b8bbe7cebf40d87f0f36d5f8319d38a4b23dee0755373ec. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/US66W2100912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5d97c21a920e0f3b8406464769be12da6070488869e23be4ac7d3ab14954d8. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/US66W2100913.