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 0x12b4c0dad842b65f7a240030875fa1ad7c4a8d658e96fa0ff82f8433278e9196. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4d0b8f6-9b82-4f76-956e-e6ddb545b81d.json and https://artists.proofprofile.net/proofs/artist/a4d0b8f6-9b82-4f76-956e-e6ddb545b81d.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 0x76916d8be9d08eea4c97da5c43e3fed9f728b356b4337752c2cca6a7491e93aa. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:51Z), 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/QZKDT2300183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370c38465f069ae4b7d61828bc02aece3032cf2e58f3e9506168d74ee446d554. 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/QZNJW2359128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5372d09355d333f025284d6a518ea1c521813c055105c003f32c4f6b392f97. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNJZ2342883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3da1de8e2f63017f008e605910ba18b0029c60178b41ff62253ad6559be96f8. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZW9K2340835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3ef85a974032c35d50240c884005bbb057e8ce58716cb8ef0838483984dc81. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZ5AB2429648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125daba5b576bf948a4720fe0b602ffc12d97576b1d58e922a7603d96ee09fec. 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/QZNJZ2407843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0691cea6fd752826b68e9771f74821518f588372c09ece7b1f33c9360f08256. 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/QZW9L2489199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf93c6605e110aa003f85dd877c53f5047169b6a66c48790728223eb86326019. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/US7VG2552736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1e5a1648a068f0199a15e47e4bd9d7e71a0733c237a2b4f9584b3020948d94. 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/QZTV32534459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6146c478464fe0c91ebbb406b6e199d8cf43ed306078b44ba45b212abbe9d5. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QT3F42583252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e3578ee2a7dd4c83ecddb47cecd49b092412ad730c4fa8b5cbf160e5fc8449. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT3F72521221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f231a45d7e26d16204ec1a8a74e5f0381fd8632f2e0dced9b8d222bd1ee70c. 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/GBRKQ2342030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4709a3c5603c60141531efc140d57c9e5e091ec28de9e4a770fb735c2d413a88. 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/QZKDT2300612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824e46336511158ad39a8fa6327bda8faefe15c40d627dc41c6b2619e80cea9e. 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/QZS7J2337971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e5397b1f8c4c5f50a9ffeaa4e9ddcac228bee86c3348ce2187f998a992c5d8. 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/BK4DA2426823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212173efd693c90918cfcd56ff8ec6dc3c0d32ae8c5fea33ce1f27112264ae4f. 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/QZMZ92324940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2a3c5a2d871614fe94a28f41dec5a7ccda2ecbd9816c95e635329649cf28f1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAGX2341673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b9784f37428e8996656ee39a112bdeaafb762947a400ceb863fdf2efc1c297. 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/QZGLM2559303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6967f3b6542f551ae28931541789d494284ff8bd4bc0c278325a0c311eb3263. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZGLS2405519.
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