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 0x2417aaea7a0363b6d754ee44227d0768c0c6e1a376c63f9753c69772631389be. 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/c5394ad3-c5dd-4f22-a9af-071be6c05815.json and https://artists.proofprofile.net/proofs/artist/c5394ad3-c5dd-4f22-a9af-071be6c05815.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 0x2f44fc47a17260fde981c54d8fa92bc2c196d8b4173697892e363b806d526341. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BX3PP2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d3bf0fdd22706af4013610f342019908c3929878267dc81bfd398e883c4050. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/BX3PP2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b08fc6a2f1fb1e4fda4234a7f711830d711d614b8b29b1b49cf53143bf1f8c3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BXNT62204114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800895f8eee906425e5b72e8ab627e68da65057fb82f14e3c4c9ab8c9186b816. 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/BX3PP2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d56ac5d6108368cd7a7d309615d05f4ba328236b2b6d82d9af332da935daa8f. 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/BX3PP2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2504c58008fc4bb7cebc9864ea66e092c73daa7dc639e16422506100e0d7663. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BX3PP2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473e2bc456d9ee68ffca3f6f60b45bcf5fbbbd213cb40ced48ea7c5d934bd238. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/BX3PP2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f82e38e175b2bf54a5a4a3d9dc0bcf14e689ca42d809dfbca946f88a5aede30. 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/BX3PP2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac30552746618514634f91d017ba9141c8879129a2b932d28d2ab659b75ee396. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/BX3PP2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc4e5baceb2bd71084c3e2231d787933762eb3c325861f231830f1586e62f44. 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/BX3PP2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89b69169ae6b0c34e828949541f25c5a4336101170f43deb8121b7d8f564700. 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/BX3PP2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd5cc1fd34d46da8ff1200a1470fec3be5e1d206582a1848bb9c488188e5c3f. 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/BX3PP2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddd2ef804eedad9d9b0b275a8b5bac5d0bc13b6f7ffeb41e816ff7487ffc06e. 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/BX3PP2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe4a62a129bddc8d4fa1832f2bd9958a730bf85d58715a8e868880397e99767. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BX3PP2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f137bf5918eb86304883bfa8dcf7c6d3cde6ccfb3f4dd026b3a53459c426631. 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/BX3PP2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc4e5baceb2bd71084c3e2231d787933762eb3c325861f231830f1586e62f44. 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/BX3PP2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dcf184709bb27f5b2325471adb467ca62797bf6b06578143296c6ddadb7f7d. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/FRX452500250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71476608a0d2b6d6e033aa3c58f34ed5987f306f91d63f901ebad82bb1365419. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA052511915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8f54fbcf26fc1b5afe1ebd2fca17657fd0aaaedf3bb40f43935b9b173aba9c. 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/BX3PP2500011.