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 0xbcc2fc0519c58e172c8acdefe0eb2fe1fefb962bfa3be6e6e7d76b8ef11d3442. 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/1dfda6f3-fd12-4abb-928a-d408b888a717.json and https://artists.proofprofile.net/proofs/artist/1dfda6f3-fd12-4abb-928a-d408b888a717.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 0xef958bd6934f38b23e8bc20a40206107bd9c8c1c05e1444457334c41351a9261. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/FR10S1994857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f38b80630d348520fb7b260398a93af1b7c7c4815d9f8ae6825489033b18f4. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FR10S1994859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b4cb50bc4f1532fe7de541cc68d2900c032bc3a050222d2118bb0cdd20b191. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FR10S1994862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edaf796e23a44a723f5cfb563a228304b72f083a1db02ab247ff5eb0b01147e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6P1964604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe959600cd4724e7dde3dc0dafcc20bcf01ee85e7ddb10a2c57413935c24df3e2. 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/TCADK1759102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa955f9e903fa5b14d22812e0a17f1b1063d5a7597fb6e189ecefb331d726e841. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/FRX282341859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93d1a2c891e03ededcd791442107165bd498788eac290d72b67b2f9f001e235. 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/FRX282341860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ab77631aa8daa3a71400cfad29127d1faa381e5a1418e9ed1705dfb4709544. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FRX282341863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6679deb5f1ee2729db317e571d1dfe06423fd9d3a9ef3456a91441c9b31eeff4. 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/FRX282341864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc2302a5f2221c3b24dc9a85ab4437b5cafbe3c87fa64be7c81385fd2434501. 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/FRX282341865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c6b5668fdc45f07e97bde514193be2fec6bf7ba78aca17f43f70d7b9f6854e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FRX282341866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dad9484651b9c64c9249c072ba699abb02166b95e6ba7bc713d6e51dd993cdb. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TCAEY2054077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f845dcab258e6c582ed4753b40dfda31d67148320ce1120872b63fbd03b28ec. 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/TCACT1669556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33938fd3063bb5604bdf2f364b4976527bc2d3179b13f9ddb28724c237a6ab1. 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/ITOBG1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78768dc374493b7a5ec70b1c679ecc3c0aa3e12d1dc633834ef98c7dfa0bad21. 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/TCAEZ2037303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07609dacd29a2d7c471e7ce5f4327efbad9ae6dbf7ab2ed0abc28b24952c8f13. 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/QZHN92034641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04acb26e8611fad3394f11add8bab2046a04b2a0e5c02ea96b59adcb109e2095. 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/QZHN92094604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e6e1120644bcf3ed4d3b9688b977c818508838e55619a22c8828d3d290ad07. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA71979179.