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 0x47911d0d15973b489c04755c2623b5b4887a4b4dc2f0baaaebcfb7a13afce165. 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/a1116e7d-d5a2-46f0-a0cc-d5b3afd79617.json and https://artists.proofprofile.net/proofs/artist/a1116e7d-d5a2-46f0-a0cc-d5b3afd79617.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 0x413bd9de9bc692a6b8e5707e2ee53a52c8c066a31de5bc277b7423a1f3dffee3. 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/US83Z1927578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbedc390ae5998ad09003a0becc588cb208bd22ea7e45df2b03dc3304b91db58. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBKQU2579539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f0ab518d54c6c7e865c0916891a6cded88445068de09bb1a00b14668212c62. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/US83Z1928250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f47a958d8740a20d15cec176221916a336fc9046df225e4d856f6b5f1e1096b. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USCGJ2082426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acab7ae8c6614d309105bc2048c7c8a784c9c4b1742d01e70945580f44fb940. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHZ62119524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1513120c95f399068b036b8555c243c751500e882f7ff898136bf1a09607c0e6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNJV2101919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409ed491dec0ff5112778aa88c9985e8a52f59fbeec43ea036c960efbc8bbae6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TRCAE2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf158badacefd94d59a0053198dac6d71a3fa57f9c541aee75ba67baf015fda51. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TRCAE2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0913286c347e93268dd2a48ca381b569e9f1c3e5d947f6e0104d03bd007c9bd4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TRCAE2200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657ca4c489c722d82b463ed1a98e135e788ed433964182136e9d79b14848ce48. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TRCAE2200151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a22538b32febf7be5f17dc1ea555939bf04b85ae532f201a0ebcb985d86912. 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/TRCAE2200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fd55bc976fd424599c9cd95760f65900948d16b8a834ecb72c57cba3b69db4. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:46:18Z), 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/TRCAE2200158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3801cd50173753e08016c91dc281c596a92b4d855d751869db3bee9d91a89211. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TRCAE2200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9258547a83d5ec602b0f6d820cc2a41d9e4170b9f07350dfd653b7d5d7357fdc. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/TRCAE2200159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937e0dbf80cf5b53cb2d1f211c7c1a21247e04c4591e679eee44c511c72b735a. 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/DGA072375020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86580bdcaa66fdbd463c8b316d9417dfd267260f2fbe56ac9199c02b82336c3. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/DGA082331943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabfc274bafdcc957c9eb3ca79c3069a0cec9f4e4ca7b429cfb500d25a7bc997. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:55:41Z), 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/DGA082374459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9783613aa867dc15460e405853c453bfee9dfd36a8eea99aa3fb8b12252e4f4b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DGA082394470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00138b2829e9395b671ff789d6eb5448f07ed57f69681bf5410bfea3031b069c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DGA0H2303956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06337a3e2bb97574c9b5d54f41a9dc96db6bfd128947b334b24f800dea700b83. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:26:37Z), 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/DGA0Q2380241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0af0bc3f35b54083787e02c43247bad92a7603d612e2bdc0ca998bedbaf5465. 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/DGA0T2429202.