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 0x2c00ed912cc77f0ccff475afec6af6024690b7cb8239fb728bcce6523b586f4e. 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/c6240b1c-0e09-4ec5-a3cc-9cd0c1990ca3.json and https://artists.proofprofile.net/proofs/artist/c6240b1c-0e09-4ec5-a3cc-9cd0c1990ca3.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 0x8a826f5603ac5d8390e951b5a6e03b46f74161d2a0e93921e51ab80d0aaa1a65. 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/AUWA01900737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd6bc5fa1b48dfba6875947e5b0f2fd6e3564c551f023d0003282de391acb70. 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/AUWA02000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c348260d7fcfdf84bab0123dd94411969492dd8c356f671be6be182e7fcc750. 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/AUWA02000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3658bd288b2a1de53fd5cc96d3136b03eff76aaa4fef33bd6b2df5e024ab6267. 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/AUWA02000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c6669e2de0fbc796075eb0f0a054e738ee01719c8431a96b9478cfc8945427. 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/AUWA01900643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0cbfc7ac2f79be403bcfdd8a99dd35eb3ee6971992a5f9e8337ffe7d449dfe. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/AUWA02000088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5a17180fb96cd7600bf4fefdc2ad521e62cb8dbf9c410192c52dbad9f362f6. 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/AUWA02000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96af006dbbd19745ed7c4b985adec660e97d239cd3ed4f4c851695d33282775. 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/AUWA02000091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ef8968c6ac9e63e532624c737a80eb703f4bd277ff006e907b3b6167441129. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:35:42Z), 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/AUXJM1900113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f6db7bcfbc2fdf8e09d8711866801539c2de077968aac5f3cbf9d0363aa882. 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/AUWA02000306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3658bd288b2a1de53fd5cc96d3136b03eff76aaa4fef33bd6b2df5e024ab6267. 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/AUWA02000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a826f5603ac5d8390e951b5a6e03b46f74161d2a0e93921e51ab80d0aaa1a65. 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/AUWA01900737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aed55e8bd70a60d82a3d8c2680434409042d3ffec748c34d1ee0811379976cc. 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/AUWA01800427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c86eeae370f7742bd2b779e970bd373420d2c538823de2b595f5cc0f0787b96. 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/AUWA01800307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14b404ad007f7c8bca91093fa7c1955bebc614a2feac03f11e5ac42a87210b2. 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/AUWA01800428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acb831f177fd2375c662cca7cbf8cbc3a2eed3aec253c29be77cc100c0812dc. 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/AUWA01800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa9c431c628b326e4a2aa857c33b4f5d936331c82523c64780120dc992f8901. 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/AUWA01800429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad1b0c0ed396883872ac134b01716bde6bcc3ef3d65fe2be1d8ee32d0c38b55. 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/AUWA01800430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15bc000d5491d92933b8e9276a5673dde9ff346f0d1d665714e9f683dc614f4. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/AUWA01800431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aed55e8bd70a60d82a3d8c2680434409042d3ffec748c34d1ee0811379976cc. 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/AUWA01800427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c86eeae370f7742bd2b779e970bd373420d2c538823de2b595f5cc0f0787b96. 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/AUWA01800307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca397b781ae33adde5cc77ac19956c890d980c63f02d6bddd6268f19c5af767. 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/AUWA01700265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d22ff4e59f60db48e50aa5bda6d9ce72057dcad90834d79b5148ed3a933f59d. 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/AUWA01700192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1481ac8b245a06bba21174b877931aff615a9ebeedcf81ff93b00c053f37208. 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/AUWA01500195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3df3560010a245240a5b8779e1c724b65f31b63c3e7a11ea76408dbb477a4f. 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/AUWA01400267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97892799a942c858922e74479927adf562ea362fe17053b581a4bafae8ab59e0. 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/AUWA01400268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f6ec251549285388e0a2db1b6048db944d97775cd8db560f9be5ae04c57c7d. 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/AUWA01400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef9706070ade296ab30821fca9077a8469e0afd7fbc50ab9544caf7b45f3943. 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/USUM71809166.