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 0x721d858c52e38d7e29f054367a85bee700e5e09fe11651eeea8741a0eb485297. 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/b14a8af1-d429-49fc-a7a1-2be14fef5a58.json and https://artists.proofprofile.net/proofs/artist/b14a8af1-d429-49fc-a7a1-2be14fef5a58.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 0xa33d3838fc203b3a400d1159fdb6ea07c54a03e47cac344202b3ffbbd1a3cde1. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:52:04Z), 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/TCJPI1994779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f60bfda0e8dbb43b35a9ec05cb1af874c3f31faca19943ae897b35d4bdb8377. 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/TCJPL2072824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad75cff7e2a3ed2b25e1a54e30d79e774600df0b28525cbb750246820fe3c507. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USANG2283429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0e1610f681ccf0ed846b38a1215a372d882826a251caddebcb6b98f41bcb3e. 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/USANG2283432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd662e61ef7709aefb2f0e7efb56df231cee8226772ac97b73f3ebe6a4cdafd9c. 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/USANG2283434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ae4f7a3b4de479f9b7d612afc121d5c8cfd4e6047c946625a885648a9683e9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USANG2283435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa79f9bf2c83dc910a71086386fdf021f23d8730df3a23336cc2988f09ab5923. 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/USANG2283436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8698895cab0858ff21f2b5412b7ec0eaea6e9344d0a90fdddb6baf31d486a480. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USANG2283437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462262b47433f3ea5bcd8edb0d3a0472e01421968b25cb6960e02f11064a59b6. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/USANG2283438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa56a9cae9a15d365cfec7c2c67f91d4b70f8572c93eec6d0f6c999e0221869. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USANG2283440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4e1c6658723ca48ccbcd44ffe389e3e5746771876eff7463dbc3b024a983a8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USANG2283441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045980ce1e489518edafa8d4fdfdbbec578e9a3544541dffa781521e86da9b9a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USANG2283442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb061456ccd720acbbebb48c51c50a0f3afd42f4f50bc5a0fbd3a63401bc6a4de. 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/USANG2283428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ce7deb1c7a068c2880101666effac98822ccb83758cac2bd0f42f2e19ff859. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USANG2284026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33e6e451c79111e56893b4cf3c913a8c8e5e15d4f8d96e2b2ec2d0b29ccf5e1. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USANG2284027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3ac8ea60bdf0cf6cf7f4bd96d89a3149bd2a983cf5f907a6ddff04966e4165. 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/USANG2284028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02bacc62a4efd1a1f51d0a2bdb174a52d432e6cd4217e4a964da750432f9c66. 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/QMANG2254996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480c20531a90d026872c354717de0c8275fcac0f76e501c10e38973973c4a530. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:57:16Z), 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/TCJPB2483987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4d660d5c5b9b2b012a2bf5414251043e54d4ef483e63dd5d67920b0eae58c7. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCJPK2522431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb39a7646953a2ac3399807a43da49359f7141bca735239e9951683fe92922a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCJPL2561347.