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 0xfb401a64a9b4004249e1e941f1b8debb2d2025dc80b4d75b63396b4e6996396d. 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/162bac3b-0da0-4935-b7d8-cbf511f90114.json and https://artists.proofprofile.net/proofs/artist/162bac3b-0da0-4935-b7d8-cbf511f90114.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 0x0693af8606729c41737df23e7129d91d1ad3c51dae93f5f481be77887158150f. 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/IDA141402216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce6d227666c0e74eec4ff317bd7026f2fc1a9a08dca2662d7c0012370c0bd90. 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/IDA141402217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fb04609e2a1fcde8bcf64fc660e94fbc3cb8149432e676b8d36301c1e914d6. 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/IDA141402218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5ae5b3bfc5994de22ca572c148bd0ff2700667630e96174e980623ec7c10be. 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/IDA141402220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb961ea59297e59b16a0c36437708fb0bb5c71f61e9b1c8eb686bf8b72ff995ec. 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/IDA141402221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1700260f4517405a1bee70ba539bb29a87bd158eb9ef92ebdebd9070f4db7f4b. 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/IDA141402222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64221f9542d39ba7e7f937fd9267a3a29b62caa1643bfb36d7169832a47f8c35. 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/IDA141402225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3783785c4652f6286b0be8a9cc07c975007e4f099a47f71ed2f4b7bb6028f1aa. 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/IDA141402226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2218cdb0e44c645c0e0a6233f18590735572f975a7ae85499725664051b5ee38. 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/IDA141402227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be5b93621f4aafb4be6c721a11ae9bc5eef62fdd16d4dd3b7e586626b84610f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR59R1952213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a6017161ce1c284190cc6ce10fd74c78b7b52402daad3def21c2aeb9d63f26. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/FR96X1975634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c82ad4238cb5b2d8c302cb7f7ec27dc0ceccda729e7be8a169ddd857690fcd0. 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/FR2X42028858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3055ecb3b59f8a3bf706d953fac01251c9129f2c286e0e2fe908583bbf6982ae. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRX281927109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039d9c0069f7fe4379c597cbd8f41a4afbdc04e21954180ad91aedfbe0137bab. 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/FR59R2056081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be5b93621f4aafb4be6c721a11ae9bc5eef62fdd16d4dd3b7e586626b84610f. 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/FR59R1952213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fa4e0300394ae912258a1cd766e09aa24039c008fb2080f1a5a797404e9bec. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FRX202048058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e10fe97b0d6d5f8f0dff747bcaed3453d58cbd5582fd4eb9e52f3350fc8a74. 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/FRS182059184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83341073e65ea6729dd112784ea2ff15e9502bb3b6bb3ecfc129cb9d7656b60. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FRX282058400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2a30bdeb46e4063ab811b601f29fece5fce8abb7f531c9695ec1a22aa938b5. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FRX762111780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce6d227666c0e74eec4ff317bd7026f2fc1a9a08dca2662d7c0012370c0bd90. 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/IDA141402217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6ee13197a4021a8cb3ef5e59eab050fbac5026bac38923f7f63c22f5687898. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NL8RL2501776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed41e1f41d0773cb504ed89109fffb268e03d93283ef9753268c09ba39e49d7. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/NL8RL2501875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0533329d543aa130d4bf02a9b5f61a15572c2c20f0a065fa9704773f4e393f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NL8RL2501879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab352ef01ff1fbb080c081b3d12bbb54def7ea3b366fd4043bdba281c2d080e4. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/NL8RL2501882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18d2dc4218f1398ea09fa272339014fdf75a9e6a139397f7928054ddad138f7. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/NL8RL2501884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5395ad5975cd965256a12438b624950271d0ed02c1515d47ac96b4f7d29fda2. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/NL8RL2501885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d266323f15c5c37b0f9575a1f8148158607f412056541ba57e9abc9f1c24d2. 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/FRX762258910.