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 0x962bd0395c0270f9f7339d9253e230a71571d646de04127265526dc5d9600a44. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8054d0dd-747b-4fd6-822a-97e10e9e2573.json and https://artists.proofprofile.net/proofs/artist/8054d0dd-747b-4fd6-822a-97e10e9e2573.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 0x21aa39141af40cb10be82491f8c52f49470d91361c0a2b42a3eebfdce42cfd29. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5630700286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e41f3910196d45b4ad31791e75a395bd9ec0168ac3fabfc417ed8d8ad45b6a. 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/ES5630700280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc57ec2528677d4e7c786cd926f1818669d87075f93a9efc03441da89dda7e40. 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/ES5630700274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104a93109d4b8005c2798697c13e14f75134e8a634d22a6ac5cfdbdf2cf6eaf4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:49:13Z), 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/ES5630700271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bb28e692ebe66f42caadcabd58f3a899e75738acf6c4a2183ade68c82d44e0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES5630700275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2d40928c2177a860332c1a3219a8374c73357681362d0c784dbebf60736a9e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ES5630700276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1404f4f1446413667ab5997246e60d13810fe6f4e7bbb1c960d3ef6e1da2f05. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:03:24Z), 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/ES5630700270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044c15cd4b92af13664efc0d768f411faed618bacb9f9e3c16633d1623127cab. 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/ES5630700262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e730aa6cfac4b3b91fbf3f0ab39b522103870223c84276b433c84dbfad4845. 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/ES5630700263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3404d90cc8d745fc0ce2223c0ad88e89294d6ca0541b3c159f1fe6b78ef618e3. 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/ES5630700278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2764d6fe2b360c388b8fcbaf02708209e48da66acd3dbafe3585b1dd302a86b1. 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/ES5630700273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21d9ee4aebb10d71d26ba67da3f617c8c593d25a2cfeb1b5467c99618a2f79e. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ES5630700279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58f7baa2a823c99d7147981558748d7128449bcb6fc0d1c8c7e6faa8f86c08b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES5630700264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecefdd10328be081d43715ab3f3be565762478c616c476ed5be24f39f5199b7. 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/ES5630700265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92de17a410f601fbf491bc475e3c76e288af2ff325b16f2f57bc81db57d2905. 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/ES5630700277.
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 0x69ab41130acd6f9914d6ca27b26680cf8dd67a6cc14944f4ba91ccfd268ba13a. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/ES5630700272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ce0572e41906a737134df6a705f0f91fed5e414df634de9504fb852eb07960. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES5630700281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f3ff382b3351ba0cf441a34da6e1a8d0415cca792298db5119244bf03be299. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES5630700282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6f15b63314b7a63d6f323a1578f38f6353c7964cc18e586d85512d98daabf8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES5630700268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241c503d73fabd6b0360c25796ebe8abb51f8e17e605d70b89a5ebb7afdb76c0. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/ES5630700283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e489de92bad360284ccd0bbca687784e4a45708e1cf8cc7a1e5c08633ddb68. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES5630700267.