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 0x4bca9a9900ff43c1e8cc76e894aecc490230a8050c4b3c595685ef35b0860512. 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/31abf4e9-ce30-442f-a9bf-3d499b79e4c4.json and https://artists.proofprofile.net/proofs/artist/31abf4e9-ce30-442f-a9bf-3d499b79e4c4.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 0x1907aba79749214c4c284cf709f12fda1795eb0ab8ade92d02408c30b4fd310b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:03:30Z), 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/GRPT11900042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a114deb58c7bf9efa111caed90c792455b2aeeae16fb6e7a5de84e346cd045. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GRPT12100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb702cc56c908d675e9c4840873e88962f30ac31d395f3aa390430f66f50c9023. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GRPT12100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc48d49d7795fc0120cbe778f64ce0337b1ba68541b28e3e5b8eed940506583a. 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/GRPT12400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221917957f24ef4941f344f0577aa24d0058d9a6b4483e9b45fef8650bcbf36b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GRPT12400144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4b2344272186b709874b2fbd8da8846fc4feee5a9e738285ae1eadbe81620e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GRPT12400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218f61ab0935eb1943a8548458351e6d0d02d06de332c5d2fe9513f0eba43080. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/GRPT12200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fb27c84a666dbdef1d7755f6e3738ec43c21d7ed0a381355f703db92179bb5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GRPT12300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ec0cd8f183e356d540a5493c89e33b375a09c0cb2bdf3629f6fbd07e3e0716. 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/GRPT12300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407d63b82c5731980aede368cc6ad23c28c5af6d5a1c9cb76b6c475d37fa49c0. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/GRPT12200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dd768e58f96d0e2d00ee6ed5f20021060c2e641f379be25153aa4daea26cf3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/GRPT12500157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc18e5c3ed6e1147382cc3ede608df06473e1dd2fdceaa21b956b2d416d4de9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GRPT12500161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd356b63de49e2219ae42b98f4a32baab89389b2e04a36b90b6cd324fe5b1e7. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/GRPT12500158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e80b2585c47ff7225c3b6614be256c529bd551ee68893ab4f3dda6bfebc9ab. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/GRUM71900845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6ec23fea36cfe57a4e25f3e2e87b6fa96eb7d5d03545324622f90a890af0c5. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GRPT11900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ec0cd8f183e356d540a5493c89e33b375a09c0cb2bdf3629f6fbd07e3e0716. 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/GRPT12300049.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3fb3e6030bb31e1beee281a00ffb6fbc5a8bb6ede84f63949af0ff94558dad. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GRPA12300622.
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