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 0x5b0a7e215b234938a84cad60148807bab55058089342b566f7dce1711d7eecbb. 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/890e6d54-0baf-4a67-b5d0-2e9dafeaa31a.json and https://artists.proofprofile.net/proofs/artist/890e6d54-0baf-4a67-b5d0-2e9dafeaa31a.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 0xad1d8638f6f3461629e71cae4cc23f2b5b37968e7c1525a45fd597586d364359. 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/GBMJG2414878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630c3ac8942e34701507ff625f68d83bc0d0efc7f4372bfee04233f17c58be2e. 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/GBMJG2414831.
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 0x505bf641c22a1e6184508ec84df84a2fb8471d770cec45ff29d381d2e79c3505. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBMJG2414832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a224f25fbd80740cf26a25f3dcfd9bed761c8f3e14e51868c714b50755d6ef3. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/GBMJG2414833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b4ed381fc9c4990f8ca76de7acc3a8b8a6ecd81f4929c42783ac2e7890bdf5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBMJG2414849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2e22ef75cd4acef23baf86d24fbb231c364d12d94b5f5526cbfd02fc52e644. 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/GBMJG2414881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a7f9e0947918fbe3d748f4f5665833ced7b1541915eb65b23a662c8c8c4a3b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBMJG2414882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ef266d9ce3ed24601610370f8fc7c5787b6da9069d2c0e02feefe1f48c6720. 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/GBMJG2414883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff6aa30354bab732ba941433db8c4484ce096bff73eb16405f811baf4c34224. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBMJG2414834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1870572ec1644c3ca01710d8b5bb626704278f6ba15e2818b23ed23aadc6b5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBMJG2414827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6581a7926be57ee138933b7fe7c5cfe5474edeaa762968c30f41dc89538ed8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBMJG2414839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed51930acc22efe9f6db09052ed4c1e296d22774bda69290580a1c62e03ba8e. 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/GBMJG2414851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da568a261a9f7887607448dcdb7957270066d56dae4a7d71afef37ea41ef9fa. 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/GBMJG2414853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9982117f103996f1d6f8aa787646578f20c1052a586a07922a34a55543d083c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBMJG2414845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd474455cdab038f6922e4d2b3602873ee347baff21c29822da431feeb2fc8f87. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBMJG2414847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764c92109ea892d506df70cbd21383cb10f1685f94a137c622dd26874cc7b073. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBMJG2414854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2792c89cf57e347aa0914d296e25b976828daf332db23a41b4c76aff67949941. 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/INC172000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a8db0cdd99c245a82c7f6778def49e36110cfa7c215d8957e8a905e188866c. 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/INC172000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9bf4faa3c979d8294a062e27e1f0a66388205f02726a303376d684b98042a0. 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/INC172000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858cbc88f7ca2d5714093b3d6966709cb96fb53b13e098d7808243c0b05ff8a5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/INC172000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589f2bed744f33365c0af0e936ca7f5f863c05429aafed8960eb26f27f042330. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/INC172000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a12938a15ef2acc1562f25f0e33127e5c93d4b29936dbb24ee4020a313dd3f9. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/INC172000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038db4da8bbbe07727b095f1ab0faccc16764fbf82dd0cfc99bffd29bf72100c. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/INC172000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0586a62656c2d91840c913a8eab867d93216a8554f6d5bafe0cf9ea073084be3. 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/DGA0M2415751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4d678b8219f5f9f7ecb368ab6dbfebd65bbca9f684aa742bffdf1c39dfee10. 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/INC172400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf52567b55d4fa6e474f88dc6471ae137e68ee7252abee6ec87b30030b68fb29. 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/INC172300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151b78ec4f7838250f32907ccdd6f47cc0f55704bcfaf9258960c0a581229df8. 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/INC172300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214f9b7ca81fc8344d6d1c7bef95aec8756fcc4e8fab2ab889adb4a93bd1f43c. 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/INC172200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b8e3ebeb17c41ef07ec7e2704cb13d487dbe0fb97e9ff345575782845ba303. 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/INC172100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb02c256ff96c4ef570ba8b143b5497baa00f2f9f500a4e2c8078f6c6788aed. 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/INC172100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb1b74ada5b6bacf61ce1827cc74b2acb470bd62010e8c874d06559fefb8a8a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/INC172000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0f25765018c1552211db1bf675ce700e991224e34e7649640c204aee48988e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INC172200159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d8160a58e265c366ca801b5316422021932abc438ec1c012a56af42915426e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBMJG2414829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a7c49fecc2229e196c6b2c950f820d48c66c7327443af3ac9a79ade680917d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBMJG2414830.