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 0xeda55b73235ca5aae648ca242dd48a646e3252cc0d19e1acdbc23364e80e9887. 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/564c1ab1-5f0b-4863-967e-8145eddba6e6.json and https://artists.proofprofile.net/proofs/artist/564c1ab1-5f0b-4863-967e-8145eddba6e6.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 0xa928cc3850c5d0acfb69c7e47f19abd1a09ad4435edc08b481c36cbc8e392c93. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2153024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a9314b650d62b6cb51afc7837ee64f969350c650bee1c0fe510010ba9f5eb4. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USA2P2151424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc532fd7812c35e3f88c39e49d2c18f4ad9140cab72bf4cc9cd8fda05800a81. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2244821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb83877126600b7c6a5cf459c17cd1265b6b6ca50a0ee389863ae47fd7a1075b. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/USA2P2244803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf06be52114ca0d5663b9ca6d8f739058769793c04d0254f45021e6256c05cb4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA2P2244802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8e07071c402399d67e0d1f07bff10490ff3cbfea21516d0680e2372bc5a973. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USA2P2244799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99486fe90dda238b13d858084b85e3963ed84143330cda45271c45a54a4b0280. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USA2P2244798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5085aba53a6fe5c2783fa35b54dba9b5b8fde1c82702f7a779b458b4e1249a7a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USA2P2240375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2469b312ab8e61c9ae66e7f1761b249cccf6714a7f8b87eb330046e5edb05c2d. 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/USA2P2230883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a9daa1d8949be6b567901868e673526478b9d6aad5e2b64a24de6fed5d1ccf. 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/USA2P2230558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31683fc6995c0028dbc87cd2cdb4eea7575cff9a02242908672db93052ada219. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/USA2P2223240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec92ae07642020b2af2d85e920895d1f47c7bc2e1cba2ada0dc1b34de7bfeb09. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2215440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68d6b5b29c768d09d9810d4697b655678d2aae10c78d453ebd5b1795461e20c. 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/USA2P2210901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9d11e7e67a308a6a6de33596cc9cbee9b2de5a4f6a6df7b882e459cd680199. 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/USA2P2204517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ad147f7daecb8c804940cdd32088c21e49cf949fc89f6468383af101dc5099. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USA2P2205578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf789d2ad7d1437a3fa35435390ad56e0e57f6fa064e076499589b752bd0e3d0a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USA2P2204415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b34f078cd46c80b3df76ceeb51c24f1c20ae81c92cfba7441b48cb1cb85fde3. 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/USA2P2158094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a9314b650d62b6cb51afc7837ee64f969350c650bee1c0fe510010ba9f5eb4. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/USA2P2151424.