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 0xbe39230807cac62586f51c5fb0dca610f88997d0d12cdd1b0951cc2c212c97eb. 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/55eb5f7f-e80f-4122-a422-fb00b5deccf8.json and https://artists.proofprofile.net/proofs/artist/55eb5f7f-e80f-4122-a422-fb00b5deccf8.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 0x9d265d14eac75c8251c908088825016535484f91fbc404d00b38b3e361eb24ec. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKXN22358849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a92be6fc72ff323f2e2f991d8d72a3a42aba38de16647b28bcedc41c2522761. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX3Q92323268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa339a68fdbc24eb731a10b363e638a65cd3c54840f08cee9f75312dad6b2a5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFMG2310926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b538529f2f15f1ff3429b5dc0605781ca506b744070f504867ea41729d6570. 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/USZXT2352806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e6f085e0ab1427a808b18c15ca9e4a210e863a010512cdb9f7f82ca00c4084. 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/UKXN22333667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d761328b33cb25578622189570362c385f8001d90e85e900826532d83bc0926. 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/UKXN22316058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafad2366ec2a1beda2f2ddb8618e4f968c4ebeb88d235907a2d262d592419d87. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKXN22316059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89303a2a63a6e32c38248a4823b63a6a0ef83d78608a264cc3e0a1b5cbe3dee0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLFP2395594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d7b066c7aac1c4805a3bc3bfadacc5a3962e1c52f46bce4e02ac9e1e4f16e8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLFP2315644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab313a0c0eaf64bc0b305c68eaf75a5815ffdf701345f8e45269e6d1409da42. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHNA2324052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5985c8dff171916b3300ebbb9af9e54db952977a8859ac3fd6b661609c668986. 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/GX3Q92354590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e807d9560d40afc53212f0d3ad42dcc5d8b387d68e6ae6f0373dbb22cc3cd8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX3Q92354591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1a835ce1269296b4d35001482e2faa5ccc9e06243880c374fd3672c4ade0a8. 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/GX3Q92354592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb4cbc002e53bc25da362d5326f8ed740f948611ba5cb58c695e5a5f31bf402. 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/GX3Q92342636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cf4de4d84cf584e855446005dc8d482b6a8af302f1ece85be903e5a172bbd6. 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/GX3Q92354593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b675141afcf61b88f96c1bfd42e955c980441dec584536d5d2b42f0a01dba6e. 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/GX3Q92354594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cf4de4d84cf584e855446005dc8d482b6a8af302f1ece85be903e5a172bbd6. 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/GX3Q92354593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb4cbc002e53bc25da362d5326f8ed740f948611ba5cb58c695e5a5f31bf402. 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/GX3Q92342636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460f42c4ca58fbce081ac3e1d7e73ec0387b8d094a50013bb5626f027d61a112. 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/GX3Q92309055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ac1575326bc285dcb0385ded46f4ecc23cfd2a8f8fd8d836143a40258d2302. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB42209609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea1be858e7a2a3ac4f343481e700aed11b7a728a0f84f12e550273a8eef7560. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USZXT2250570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd215285987c5cf480c0458293ca83469fed6037bc0f615e1937c0d5e8a2e442e. 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/USZXT2250571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198dd028b9fc0f958bb18051aa3a7c58a433a2b3ca5ef4af6df9472a63991d9c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTAX2286432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc224bd99434156b6ce8f5b75aa174d432597c976c22426c65a8529abded5c400. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZPLR2256530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc2d4eb9aa0daaeaf26e5e36c70946c7218c018bce6a2f5cbb1c9f71c6067ec. 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/QZNWS2245120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c7eb4ffd66f0d972bb327efa0cb225cfd38168a92bf6a7c848d864df40d315. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMER2256799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e644d9e643128b2e925255ce6c57bd7057cf1f55a9e0dde13e5bc7f1e8da1c. 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/GX3Q92097438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2651b2343baffbb395cf095974049e65691d2c4b63a99946c55346e561e4cc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2208732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ec830a3bfec8e6aa39c008c614ffaeeeec018f1ea77943ad40692f4f60aa23. 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/USA2P2208731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c81413cf6239658c6b599ea66ae93391ffc6e063aa6bb6b8dbff123ca1987b1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ42222191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9f5ca0e629af19205f728d20a61fc7726214d592605dc637a619b3cc650fcf. 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/GBCUW2100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f0a9c146d0a41ec8398ef6663619bdfb7564969bbbb5a17cea34fdb226595d. 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/QZMEM2114212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc92551133899a326657afb51ff1e6ce38d44739b10a6909a034fb2e4c159f9f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZPLS2008970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62a125f30d8af70e389a2c135ba925b01e839a3e1c14853b68eaf810ab4de96. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USZXT2353131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1322653b3f9d85196d9d5126c36742a48c914b2e012c4b64ec6bcf7444b2fd6c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKXN22443577.