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 0xbfc0c885517b971f9f4518f911c592fddf9dfa7759a7e027a9c47912a720c05e. 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/9ea3cb52-4b13-4aba-be2b-b4c25cb6f5b9.json and https://artists.proofprofile.net/proofs/artist/9ea3cb52-4b13-4aba-be2b-b4c25cb6f5b9.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 0xe733d5ac797d88d7998f7e72b21077f310c6107c81704ce61e7f0ac0d35219cb. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:45:01Z), 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/US84W0900514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464345a1ec1d3e29becaae5200d28e83a5791e9da4b30d33d2924638a8ee19fe. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/US84W0900517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b81d4354b5c1c69ae5523ff7e1108cb256bf6a4fb56a7b728283c46aaf809a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US84W1100533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e65e3fbf87dcb3ae48239553efea0afedcd72275635930569af011e1698307. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US84W1100534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0bc5c2cae19056bb276d9a30ab3d39bd600daf905806386d8cece2fecfd195. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:09:45Z), 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/US84W1300549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ffd27629d2c2c23ee686fb293af2ad9e9053e5b4fe315d0c44a8ea74dd2e9d. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/US84W1400566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76eae303aa993447352c7126f1e3004fc599fdea3ebbd0508cd6d978bcd462c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:16:40Z), 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/US84W1400568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf798f83a2e78e2f0fcb478c7bab6479bbd134b73c8a339b1c49b6d68c0665b41. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US84W1400569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dbc5484cb9b9020e4b19e62ee9b6744ae59dcf3871db17fc7afd77a1b3c012. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US84W1400571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa468b0aa499519f94f45d44512332fb8039eb7bf820e16c201abd8e8376049. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:00:20Z), 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/US84W1400574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cd586aba17ace0703af2b6caf85923296134e33a65d17e5baaf7458180d628. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US84W1400575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69922e8124f19fa3b59a0cc840862938874895baea6ec8277d9092b54858d430. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US84W1400577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79db3c1c48c8ec499ba0adfcaab12b726b39154bda24c448257296969fe213c6. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:07:07Z), 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/US84W1800579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015ee9c2587adeec9b5ced946041e7c0e2ed51307d6f285905796e1397941757. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/US84W1800586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cc4d28b8fec353b596fa6a571309722b6dd633c722397505fe25457d040268. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/US84W2000614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3f4cf41dd6d39e810e8100c4c42160a0aba6e5705e0e800c0f27a472f20422. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US84W2000621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae0d66af50843bb7cf382a08c6b88dabef5b07896724df1e731e3a523686dc5. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US84W2300630.