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 0x9d67e05975b0e72927f9eeae1045d23e2c686d167c5d8a9f2414978680e8dc03. 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/1759496c-8a08-43f6-b999-775350560bc1.json and https://artists.proofprofile.net/proofs/artist/1759496c-8a08-43f6-b999-775350560bc1.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 0x0bc6d5fcd808e737777abe708a92241ffd3e95d0118fb24f62fe99f1c378be91. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/FRX201707851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dea0cf666ca59e0425bc049649d2fb290a573170dc323f7f01fded63ce8d86. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FRX201797138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572b2d50757194a505e1f0e49d1396ae2fb0521c8bb23967935a3ea19b54ee9d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FRX281743749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb788854ac0fcb01bca8243cff873e0f127a9d062939dc6dc07d4eccf64a0da27. 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/FR2X41805935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c22c78900a125a086ca34643fae5c48f59c3e8fba28a6c717f602b5c25b2cd4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR2X41805936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d483a3d5f34ed3f72f793c9a81f12a9d8a945991f199e8ee8f4150fd4b7afd9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR2X41898139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952c1b6207504867e8ec73c3aded9f53e82d2f62b83fda51ee831344ce0461d6. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBKPL1828283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034d311d82a3db990c91e30adfc728ab3e56d7d5c9e14c4d06414f2973e1ef75. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GBKPL1959029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d60026fa0ffbca5876a34b4ae94f82d963077853a92172e5ceaa4f3356f268. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTB22274171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2a611f224844a6bbeee37aa786a222d8569f2df005262dafd9bad57158f9e6. 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/QM4TW2351862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42809b80e47876a6927a9e18f09bf2c6912c6ab16cfa5649794dcf09135c830f. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QM7282369226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef4f1a8ca0b52a9036521e99c1b0d5f4d03aa00d04504df41bb499a1a58e3cb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMFME2322340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c643d0423f7745550a9faae5c4b13b963d5b317f10f2a8693ab4c0383bb1b6e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMFME2367792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f74f81cfcc6ac8eb885f5b4e1de19b0be5f617f34ded49fa044a3bd6bf5fe1. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZTB82382731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123df32edee88ea4a95478b17eb33e65cf22aff897f022d1367103dad7d71906. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QM4TX2405301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42e03deee5b5d7a43815e0765f8e37ab38fd253bb9b254a25ed26dd4366df81. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QM4TX2405302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b958289b8a28a55f10cd944cfad74d028221c77bd831798373541ad465ebf19. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM7282464445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2845a9911b4ee0b02de87ba0ae563c7d03e2f6e16bbd2e6e9ad7a78e402af420. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QM7282464469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138eef0991bfe6411e401b2ba233d871698a1218e3e597a62a0174957deae966. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZWFN2408988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20e50cafce75492cca499203d49c0d13cb1029f983cf75f2a6baaf827759114. 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/QZWFN2408989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827e29396a7079800e298b5d229c15fbb41b55683d9245e0e6bf5f09d91338c8. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZWFN2408991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5e6704e637dc785dfeea1d4968efdefb79d2d54e364b2c0ea71f3fe055a57e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFN2408992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ad519c1a88b874545c13e4c63497039be28e0a48c7b734647f3deaa7798705. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZWFN2408993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5afbbe02f9b843e12383ad2398d001946e07035190307828ba733ac48d3f71. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFN2408994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c15fd3c1c9637e4e40bd656a6f1b2cb5ac49c5d0b32baa7c2ecf037d76f9e6. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZWFN2408995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c748e5207eada8b771fcc0bd7378452bac7dc03e6c969baddc48bc33e2c638. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/QZWFN2408996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414d4e4812b4f6a0216b2c5dd2f5bb7a8c7cc7138c337f203dc3fd8a0c854bac. 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/QZWFN2408997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c329b7634f69dbb053e92e37feee731003baa9b6b38c0eb5631498afa931be. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ762484762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1fb063ca8cbc35608e774a6cd47385287188b3d57f8218b008c51baf2d78f4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ762484763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c0e6478728a88b8edcdf4d7a1a2d2bd2e07dd1b2d8a77f67e20113e3e4666a. 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/QZZ762484765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fe182a49ca4d7c5b38fb8aec7fd11c7a80745d9fb93e87fd7bcd45a498e1d4. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZZ762484766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66b3b2417b36d331651dcb1484fac783686f973e52acdda8ca900067e1ff075. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZZ762484767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85e168141af4ed4d1f0785a7a8023c6aa2ba465dbff6257016afd58e4c2ab64. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZZ762484770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e9b197ad16ba7f44646d794a708051d63a615200f9c0d23d9b9d4ad565ffa9. 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/QZZ7K2475156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab6643f147ad4a9c14d95e23e554454154e1fc983b255d408fdc20978dda9f9. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/DEUM71600655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f2fd78b79be1d5538580c1cd992d1f9236f1a97b22f576f882b53191300f57. 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/DEUM71600208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd741b45c7b5c2451e9d7f66d20685cbb01e6fb9a2efa82f87f35f0cb90777968. 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/DEQ321700419.