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 0xf84180005e296d4dfb913e0679ae7ed8b9a18df9dee09887b7fd5edc9b90c881. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4a25256-e273-42db-8f73-5e7e1ee04bee.json and https://artists.proofprofile.net/proofs/artist/a4a25256-e273-42db-8f73-5e7e1ee04bee.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 0x833886488c99492da673729e8d4136c85fd68a379466ab26b8a1a69b675fa9fa. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/AEA2M2111425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b8e201b37803b247203ee5518904b7be90f4dedbf0ac5fff6bd24d551cd109. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/AEA2M2111426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333eb980f1756d8e5e9353af74c2e814b18034afa923f12de940b5a72ca33c1f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/AEA2M2111427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b7e75a42e7c16dcb9afd3bc635c5b4b0754487953677cb64389c1a51ee90d5. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/AEA2M2111428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086b6a72d5ea679dd1d1c51a9d073002610355014118b313f41f30d011227be6. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/AEA2M2111429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9624e23ff5c06d284018f36c10be3b5dcd30b577c7701d1148b0b317cf59f9ec. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/AEA2M2111430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8e11b1f72708ef7a8bef432f06b5cf31bc0fe1c1796a29a8b0b8ad6a97f548. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/AEA2M2111433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fdf3dec288b40399bef5f7a984ec3e269c9e4fa59b0b980868ca1e920e1a2c. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/AEA2M2111434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6da1b2eccb1d8b91409a9c6437a47566cae79357ec8c62e3a479f595d3a46fe. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/AEA2M2111435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a4c769afcfa239ad8ee2fb34c0dfe7ca20fc9fd6c51528716a5a3765c22499. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/AEA2M2111436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11790d808a98af7c03c8434749191b551c2782764c7cce4ab94abace200d9bcd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AEA2M2111437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdbfae10db3b927ba2b3af79973a368a712f752c6a015070ebfde9f3e8d4c27. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/AEA2M2110774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe329df32f5bbada19da04ce05abdd7b265695524a39911f0e0744724ac04f750. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/AEA2M2110776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9e45910ff053f7fa647b606d77612363b80b7b2ac3035a600e8d3a730f44c0. 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/AEA2M2110778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51504879a78c9e84e20002c7ded47450d39fd2cf79be7a7d292fb6f1dccddfc6. 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/AEA2M2110783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362a367c7c1784ff40138ad453c36773cd5ade393aadc72590a8da192d52aa68. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/AEA2M2110785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24c7c0bcccb9852c60b3d14da98a2e40b1722938f6b3709e5a960569a423631. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AEA2M2110786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199a9ecd9900cd56d4bcbb7efcfd3ea809a12757731f69d07050943c01975707. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/AEA2M2110788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107b33757aef5b6654f57e8287193202a5d68e000329bf79d6a4385221c94da7. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/AEA2M2115817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674661f658cb1edafe760332030d9fa012615709d392067cf3da369d55d7d177. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/AEA2M2115819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb31dd4bde9cab0aa01e939d03150054a6933f7b6e6c0772ef08c7a4b92907d. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/AEA2M2115820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b55df573a77327a2410c18619ee351b456606748f00cb70ab8fad8e604a463. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/AEA2M2115822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6e8b9da6a622d65eb606d6d3a01fb49584f9b2b8638984313182a5a0b98b72. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AEA2M2115824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783f8741d5729d6319f825b0f4cd43c57d3554787c9184ba2efa7a7fff571f0c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/AEA2M2115825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c40971fe63473c4176e97a9310283b50149eee74bcb8e1ae1473d521098b7be. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AEA2M2115827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c206bd3021eda64977db7068b5b1a54824a00cef6f574386232a9f0bb520018. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/AEA2M2115828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb739c029c623c013cd6245a9ecc3db74035d72b70ebd7f2dff5e6fd86f21b81. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/RUA1H2219188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadf3241c1970631a5402a4cb4f281a51ed29aa780bd418e07e7dd47d2a93d3f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/RUA1H2219189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb381c1f8f6fb9de44ed07f783cd6a3d1968537b29609d736b697c3ebc0eb4369. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/RUA1H2219190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced212c2363414206434016dc14af3de24ac4b14908600499d68c7961ee41ae2. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/RUA1H2219191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36426319233557df46e9b77e61c5ef1592950a0266d579ed41c94be628a46217. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/RUA1H2219194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b2acd28e405b7711a8fdc62918d661e80175d53c7d2b55d5e97fbe225708a5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/RUA1H2219196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f789c98329ac01977fa1592f0133942bba77e8c5be02abd17e6c6185f8c14d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/RUA1H2219197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679de25d84564dc0de5b133b95bf4c9c60873a1f1e96c39de18a71ad23107c7e. 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/RUA1H2219199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d55168c9e1a3cebc7da0d0d067735a48c1c76ef953ca167169ac8f18a579a0. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/RUA1H2219200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8370537f1b15c96c574dc161d152befe2d4e713813ce11b3cbef7045a2a1a4b. 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/RUA1H2219201.