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 0xcb66ad810cfd122ef5168f755a926074c5311d37e85da0a1d849d1d55c6a8d99. 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/004c859c-a069-48f2-b4e4-f39b9482ca6a.json and https://artists.proofprofile.net/proofs/artist/004c859c-a069-48f2-b4e4-f39b9482ca6a.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 0x8ff1d76d31dfae24878ab36ef2471a2b96ae391896d9c8b1fea9e0a2efcdee79. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:44:50Z), 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/QZHN62112392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efab6ddb36eafee5cd6324d642e2cdb1ddbe3c536812bfae739c91547622424. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:47:18Z), 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/QZHN62128790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28d1bff58d1a6d2311648c7309f7151e95d5b818fbac1fad44e0e9b9a52ac83. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZES72191282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2fff0a76c1a3ca579b7763874ea2467f32e3f37e2c61b2adb46446c618c8db. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES72191286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271c7e46da9d31b5f1f1cce86228d039ba0315b91e6f8c678cbd73a481970637. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHNB2120549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6704f9a8ff03f4670b11004a5b9bbb5a677355634607c2af75bd6e94ad3172. 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/QZMEP2151152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09df35a38bc4337ba131e2be6ceae8b57467cb1501592f0c5a64620b590cb54f. 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/QZMER2153894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10a912cc4c00e032a5d9bef426454ee305bcd5f1d2bb98e8a06c5c9a700f6fb. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:31:27Z), 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/QZMER2153895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bbf02921f36fe35a9c3c87f00ff30e361bda2fad2676ddc02debb6148e7174. 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/QZDA72253440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b07ab4232f57d09ca86c2e8babcab0cc13a14835fec3485be4bc81b1780a23a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZDA72253442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6657f4d3ab206b1696666e197ae9dbee97af8c400939d364e25acf2dc066498. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZDA72253446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e34918d59bb14a8d83c034e4f1a9bf0b5adca1b5204302260c0d4f92f5fc22d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMEQ2218053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb57efba04fa6a7c18ae45a00eea035fbe9f5ca0d83afcd1748da5300dec7e54. 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/QZMEP2272027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4b8c9b8963d23aec19bee55b370bde405011901d3ba7632e4c801d82d9ef32. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZMEQ2218058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654c8e565345018ecf64d50304698b6708e32292982df4d744dc0a1ec33e3e4b. 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/QZMEQ2218060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cdc5d41f44b5195cf2ad91845cc9886f5b9a26c04dc75896602afdc64eff9c. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZMEQ2218063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a8aab933a731095a465795b179c61239d102f316447c1ccea024145c0d82de. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTAT2272997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6398334815c958473f96842ec8e90b9d8e72e4c5af80ad24be6ca916251d470d. 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/QZTAW2257748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad7b85fc649b18c7c7a918ebfc2a2cc6353171620944973f00c626e39820d1b. 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/QZES82301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9007a8172992651ab3059c0c64fd363a38b939b8cdb203d9ab56ea41d75d6a12. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZK6P2342822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c10a469fc18aa1886fbda740ceb7d59d4f2dd77348a00a35fe70190cdd4d19. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6L2345068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f66bb33f248db9b567be384d5fbd71274caca0d6ba1a8a75dc1b91b6c0ed90d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWX2321750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0ea27073d97ff443489b9cad04102161eb0ba00a45a7faf90cb41f94014bd0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAZ2332708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7abe0c93fe8cc347926264cbee77f127ee57677979aee8c9e5a888b7304ff93. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTBE2355917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70586163e0d30770dba92b6e50590d5b5297e4200d8f2fba3fa83e4d04b5f6a4. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:48:03Z), 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/QZWFJ2376319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa121c48100c338cebef334a23c221535a0e1b4ebc9becc4f7a336735f109d82e. 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/QZK6N2450132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1e6d30bc9cd357ac2d123228dee6b93d5077ce99155cea204ac288bf224496. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZTBE2419571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa589c3c2deb344443c83beb4c45af8e02c3ecf4998d9d44da6dbbf691740cd91. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7S2419196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac773b4dd455ad0072435eab0ac85b1e3c91b74d05aa47f4e3861bd5c57b6f6. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZZ7S2419202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826a644fe53e614a77bed11b73553a1bd70ae1f9692e4f63afe453e38a455631. 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/QZNWR2506396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afe182b5749ddcb1f0a5d5a463ade1b10c30440e1516cc666441bf2590865cd. 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/QZWFJ2525057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274598a55af2eb63997b5c6d37e3fe5091a6770f321300d4efbe0e73ebd8d0bf. 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/QZTAZ2313027.