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 0xf5c3cb009ed29c440e02e602a4783554eaa6d581fc803ddcb63c03746b358d21. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28a0ed4d-f763-4887-ac0d-6609fed94b9f.json and https://artists.proofprofile.net/proofs/artist/28a0ed4d-f763-4887-ac0d-6609fed94b9f.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 0x7b83e69a21c0cb6151564cc933310847ef163e5eddc80801b80cecdcf55c2b7e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBSMU5789910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c0f6a1973e70922c51edfb024b4b15cd1b94ac7287bb14715818ee4feb9b47. 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/GBSMU5789912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0f288acfb9859799f6193ba8a07372ff2fdbbcb81e221b818719ff7cdb55b0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBSMU5789913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20650b2e21bf7bc268154f21e80a609e547f9d3bd2781ccef140964b81a244d. 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/GBSMU5789914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f62295aca47ff66b7eb3e158e29f8ff3bcd7231d0dc1b0ab52306985d907ac. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBSMU5789918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23e29b5f1867ec3e323081b6598b04e507262ebc437be464ffc8c2cb9f3a511. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBSMU5789920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8d5ba5b2711f1d253102051a0638b0672dc4c7cb41762def19c496300c8d6d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBSMU5789911.
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 0x5cb58e709f896997c09dd479577bf2873cec4c401c04d35f48e5e23face31396. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/GBSMU5789915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fba9294f948e150f1da033355e3657f0752b46021cc2d84ef69a31de6d0c5c7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBSMU5789916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfaf43bb73299663220b2e4bee8f62119c92283615a3d5a436c96baddff06669. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBSMU5789917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa285badc9e66aea4d3843d1a836f72e9876ee162cc8e129960093ca57b669d6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBSMU5789919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e409564a717a024604218ab4e41037dd7d60a59887cb8159a3a39988dc37de8. 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/GBSMU5789870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b553be6f216593d5bf8278acd8cc94b274bd06b0c2883b322ad0a862ca38d68. 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/GBSMU5789872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a855e78521d74a81b7623ca2b91ddb364d7fe6f26daec2e731d624c34344724. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:58:29Z), 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/GBSMU5789873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68468fb05145bfc51b681f626378cdae433d789096b21e9ae9205c1b6885d551. 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/GBSMU5789874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e84a1e7054dc6373722da3a62413bd548d6d5ae41b3645e5dfc294a06a5fd73. 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/GBSMU5789875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb457a993c9a11ec836ac5871f888a11ecb72b2d717ef1d03ddca1e8804d9ae8. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:49Z), 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/GBSMU5789871.