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 0xf81208fb92eec02e9969ebd252689bca83ee725212a4817120db0521f28eec49. 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/58e5fd30-9a74-4c79-bee1-77a184671377.json and https://artists.proofprofile.net/proofs/artist/58e5fd30-9a74-4c79-bee1-77a184671377.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 0x73551ddcd21be8e67648f0f8e3c6e717cbc123b940a94ff8e61bd3506485e4b2. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/CH9961400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9ba181196d0e78224cb8fac08955a9f42168a703025a5429d7019226ee2964. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/CH9961400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcc674948109ff968d07828be6d380d3498e12c241acb2d06124b74bb9c11d1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CH9961600301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132fdc1516c6eb6b859608f622ff7f41020d5c5746b2667dc44e93a3ac58d992. 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/CH9961600302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c1b245dafab7b76dd5ee708811344f7c323595ce591a98835eb6bc76c69a94. 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/CH9961600305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdd81ebf7a65c33a976f547eb26e73f97cb229ffeb032f3aab13275b922be1a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CH9961600311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8b25d87a7240a2f3a86665ffe4de50fd30daa5c9b19e59cd7270358217e8af. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX202082206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0dd2f282b4a809ed8db387f7f1bb58270f799399e1f1bbc14b3105d72bf52f. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/FR10S2170431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57b997dde2229591beee59d97c9db78a684fadf956be9cd6b3ca1fb8004ee5c. 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/CH0012200156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57b997dde2229591beee59d97c9db78a684fadf956be9cd6b3ca1fb8004ee5c. 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/CH0012200156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32987907ecc9effe178d72c4d3d309cb0add1d1ca33255a1eea7ec70278647f8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CH0012200263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a02246c2dc9fb23b6705701d328b4dc82485c9b424a2ee784232a54eddfa6a. 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/CH0012400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4826708368d441cebd80f893e4980e5c9603f8a209669e669e93e02b4dc6b2. 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/CH0012400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fa9b353a7e722767f187b37fd87ae653e09da57e2a101da9e02c949ffe26f6. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/DEZC62502200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10cbff01b499bf22b372a7d14236822e7be95ac85a2b79117b363880a91001c. 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/CH7812198245.