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 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 0x2807a84af39b401b41f40a5b4a6a552b2b36e3561e88f363c53b9f852fcecfce. 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/7c5326e7-b48e-4276-9661-9796f415edc1.json and https://artists.proofprofile.net/proofs/artist/7c5326e7-b48e-4276-9661-9796f415edc1.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 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 0x266223d46a3e140d69ddb25376ab007fa9aa1dd3ff2a4dca4bf256540f7d63d7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUJPV1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcede63939373c8dd56863687170b255581d4567fcc9e7e6ad84331b863251073. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/AUJPV1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6a7e00997feccb38e548587a0aeefea6fd542b5d3390fe5164276561df0b13. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/AUJPV1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a233a6b3f314837fabf1a42c818b34f2ce5941644f66c008e91858e266e6dc9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUJPV2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a233a6b3f314837fabf1a42c818b34f2ce5941644f66c008e91858e266e6dc9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AUJPV2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dd4cdee58b7104d30441b0488b11733c3c771af52683f6643286ddbd283ec4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AUJPV2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1be75e581dc15ccd4252c5b42d794869d3352b3b6a07ae82e435683e63156b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUJPV2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ddf72addfc4bbe6ad543660521becddf04b4bd45112f47f6749f19dce89b71. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AUJPV2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5732dab1f9101dfea6fe1d034486f82390d37e0f8da67ab26160d3ddd9ed5e78. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUJPV2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dd4cdee58b7104d30441b0488b11733c3c771af52683f6643286ddbd283ec4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/AUJPV2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7de5d0cb6b76d69589cc48e929eadc55448acd96d048c4812204a153ba301d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUJPV2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043ef76be73ba3f66474b20de500d26002447a5367d8b1db0aa45e7e39dfa003. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/AUJPV2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e181a934308bc6c4f937da66e392c1c979e490573058588028b374ba39cabe. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AUJPV2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ed623a70c1bdc3c55ff627f6028509b4e5f381fcbc129f0bacb5779f6056a3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DGA052297307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59ca8524d74f8ba904316f9513e767c1563b2fb441cdb6d8a89bedace33e2b9. 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/AUJPV2100018.