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 0x4e61a42ceaaf671793607038dc2daf3dc27ceeaa08e793f1ff302fd216392020. 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/1a2fa03e-bf9b-4d47-8b9d-2ede51216d89.json and https://artists.proofprofile.net/proofs/artist/1a2fa03e-bf9b-4d47-8b9d-2ede51216d89.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 0xc2ce4ae96eddd213fb1baac2cbd42ef29b4d52d69bda95c1875ecf4c152042fb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMEN2330000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b1a1ef1c6369faa9c806f9b3ce1aa4609b4a0b2a2fee0a46f5284aef515dd3. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZMEN2330002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823fd2e34ade2b11ade0044a8e949cd1640c3035ea7156a21a923e40457c32c2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMEQ2456364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ea327f505ffb80c0aa234ffb76c02439c8542cc8547264bbe1838d4bc21f9a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMEQ2456365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ab690f5028328a256b3e9a9c2729df9a3dc0d3bdb0989f27638dd23349c0cd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMEQ2456366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b12fe5ea7ccb3a48c9d78fb2efde96ef8aa77c434fb6e8a25aea8877b4859d3. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZMEQ2456367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa4999a2a4937f54c9eac55020b2106aeb7266eefc6a2aa2ec7fcc14afa6f3a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMEQ2456368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7730f5d43437b780875a65f66eca05ea73862855b664d492f955e42dfebfe8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:11Z), 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/QZMEQ2456369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f35d645aba664b5cf7fca04dde472a3a6ba014e951a677067c29712ca9f2587. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/IL7532421590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104766019265ea958b7c3ed57256317e748849c7aec39a26987bed63a09ef77d. 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/IL7532421651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c559c51729062d0bb2e79bee3f7e6a5874b08d63aea2156b243601c9fad199. 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/IL7532421652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d03d28d39a5c4ab262d8fe0a69c590d24002f673ebaee71ff1a9d9a58ab504. 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/IL7532421653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d85568a248fa2984fc80d7163a2e3269ee13c713fcce733d2f1c17175d38f73. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/IL7532421654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f35d645aba664b5cf7fca04dde472a3a6ba014e951a677067c29712ca9f2587. 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/IL7532421590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae94d1fa593264af635e601e055fca6dad4d83a7956f415aa39f077f5d704b41. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:09:15Z), 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/IL7532421655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ef577fcd079656279b17bd5db563bec68d8f44da974924a59a873b0508ec2d. 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/IL7532421656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2864b4e67f785fe911f72ed86456d42ae8c0c09f7f82949acb2d6faf42bef538. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/IL7532513686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd7152175287150a5732115d6552d372990b7c10d61cb714684356bc91603a4. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/IL7532513799.