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 0x4024286d9b1f0f022efe5dbc09b4731b6dd58a70dc891b34a0e2c902419e33ec. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e3a8f32-56a0-49c4-a130-766760d8c3d9.json and https://artists.proofprofile.net/proofs/artist/0e3a8f32-56a0-49c4-a130-766760d8c3d9.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 0xcedab14d3cb70d7f6b88d8355f15b722fbc6e5ce1f2362e51790b12872c2794c. 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/TCAJA2408345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522f65f106ece1818fff35ebc161d8f925abb892f12a1086c24315d2e1e0b8fd. 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/TCAJB2408347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca979b404817e1b73e5590c26bc454fec8191327217a74bdbfa5c7ec3b922a2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJA2408357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141905c2d09728d9900742c4539a1843bd6c1ef0705aac45ace6f9ef93fec061. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAJA2408365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd87076b196a3698c65daa1fc4879b76fae7ec94321f6373987ba3e4e22fb4f4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJS2597286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449d30aa0cca4a90574523be14e4c4641157dbf85ae74bf0344b44b57794fb1a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJT2597287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afdb79e58a4e97968b8c12d584d6bf8dc1818a3fe8993c57f675412590c2d00. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJT2597288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fef6b7c9587b730faa03d4c09cbdb95fb7e624e4c07dc5e9e6d878cd89d0f2c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAJT2597290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc111f3b35568e46732d60ecd60aa6441d6e2702e49cf4c98c6a5dd8236eb372. 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/TCAJS2597293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee32de1d21265f90a6eb7256af88b7fb2bdad1061fd567c963219c97f4232c82. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJS2597295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf548bdf5f652907b6c88605edce3335d603af052a93cc7e4298576d75aace3bc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJS2597296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e43168e050b98d7cc1ebd70c68f37815d1b180aebfa1be4f5444e713df9cc73. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJT2597298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565ade36b0bcfac0459780461460e61175075d679b5a0ce76b1474fa1e4678a7. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/TCAJT2597299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5feadb98603f41dacd4adc00f3f54975817e75f0f33031866668b61d189dc7d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJT2597300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803bdedb968880452a9fcfff54df1a96044377004e76d928ec746e99ff370ee1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJS2597301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca221828dcd88bfd429bcc334d89b174ea97931020dcf3e96fb3c768428f667. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAJT2597304.