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 0xf2d824e7e9af780b4ec8c37750ccc7bf4915898419a934690fb269afebfa38ff. 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/7ad5f850-a6b5-4c0e-8e71-02028163c17d.json and https://artists.proofprofile.net/proofs/artist/7ad5f850-a6b5-4c0e-8e71-02028163c17d.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 0xb5b005c5818c6633a9196498a3aaef12da3cf6261a4f18388b81a858893bc72f. 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/TCACH1579738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d36cea27340911fd7334c5fb148fc10300968f39555bbd10b11589d26a810ad. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/TCACL1633812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed49378693aba4c2537c1fa587d0b319d2bb162fb3ad1f9fec54e7ec4690157. 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/TCACN1664925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1b3f2ade2c709ecefd67a1d836ce2c1dd81eadc92112b6af3f9755edec8042. 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/TCACQ1634548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7eebd692f0550528ee28953e639e3d2fa8805630547fde4cb7634dedd89365. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:23:34Z), 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/QZ4JJ1720577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687d099cf97374f0a378f2875c0bdf2c78a1e181be88a6193d5d4431ef7b4e1b. 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/QZ4JJ1753195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9ab8b6fbc9a028daba183ca9ed0bce6c5d02f8491ecd8c0e55dec29a146c81. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/UST8K1704873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651ac6b99e5858273b6b195d985435d436361ac4a230c4ec81f5cc65f2db622b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/UST8K1704874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d5e2d8a6ff56e9b9d1853f42cb91c1390beaede487e1a4a62c3fe9dbdfb7c5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLS3R1700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62806f19c571a7df600aabdc594a7a64c52c19f978f01b459aeabc53f577f7c. 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/QZAPG1726883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1dd2051b3f6ddd36b3498a641eea9e6d0c822c58986efbd18ca32ed0d50696. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/NLS3R1800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf0c64459c4e3180c38de8da1cae0f3293e64c8e0de167766874125b5f4082c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZCE61855601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0899e7a31865751b809f21ce3dc1a34f1f0a64535553de1d23bcd50809056fa1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZCE61855602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0e5f04f957a7777e6937aa108aabc8704e6b80712bc83c16756f45828cc960. 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/QZHNA1986497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31fc4a759cc9f820266d9344156e4f4155b2fe96c4dd1a0f4f116ec775e4080. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHNA1986499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3022d5717191e855d9200e69552a6c32a02e12ff023375caeca21acd1b4fe626. 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/QZ8GX1700917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bf6823ea2e1c8d114eca66e459b8ad8e877bf86b31f6712929d7fd4121e264. 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/QZK6P2050850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441fc8633977c13b8d95297b3856cae182c826c4581271835298e4e7ef925a55. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZKDK2005917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2140d0c13c43fe783e7292b160bbbf2b5b2599ad6783e2ada00ee7f473aef45b. 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/QZPLR2085721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc635023bfb82a6b10bd4cc37d24783d0edd3bc96c85060e949fd5d707b799b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZMEP2000902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8af96caa330b31b99eeb80eb3a03916020ea483ed81b11786d2eda1b62d32b. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GXHND2521884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7212239ef9bb02f3a6b518fd9af65c723c238b6a7a906cadb751aac356da9725. 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/QZMHM2245301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa42796908fe56329b93ca0b31df91e41eedcdd7fc836b3ee731b1f4f2ff641. 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/CAR071700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36df1d5da1b9dc9f7376223f902e2f12349a9a236e960e032c2ee4f76ca7c2d6. 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/GB2LD1700114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26463787a31303a3416cd6f8ce25408152f48f20dd941c174c6168ee75e8e76. 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/GB2LD0902502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1477e22d2f43516ef3538077a9811cb152b9fe773c20899a0f0f91ac42fcab87. 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/QZNWS2302894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1477e22d2f43516ef3538077a9811cb152b9fe773c20899a0f0f91ac42fcab87. 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/QZNWS2302894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36df1d5da1b9dc9f7376223f902e2f12349a9a236e960e032c2ee4f76ca7c2d6. 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/GB2LD1700114.