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 0x3147105b7c7904667a9e405cde548d9d9cfce516fad1780853ad53eeeb88247d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08da513c-6fef-48a4-85cd-60e1c8d6e966.json and https://artists.proofprofile.net/proofs/artist/08da513c-6fef-48a4-85cd-60e1c8d6e966.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 0x5d7c301e8be8e850bb0c23b0246b48a3a6647406ccd17eed5067c1e26fc7882e. 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/QZTBA2241031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fcfc25504b7ce54b24f711e636398e5b8ceeec9e095147b3c62fe331471966. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFZ42306064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfac113783d9a58a173ae25df0628c4779fa06ff0cd247a51bda231f05b06921. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZDA82398187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9894ce99379ba3441dbd95aac118e397aa1e1486f63a5effcee7722cc61912f3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:52:17Z), 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/QZES62330422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04007f0ec937b67bcc556130cf4923e8e735bcd8a571818e0cdf21bbcbac86f9. 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/QZHN52384321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575485d380c194b78b333ac73b99cdc1184e59117e72154379c325751fe73049. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN72336948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1211cd3d3a76aedb5a0e6c61acdeb771866fbacf0950596bea132c9aaf16205b. 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/QZK6H2343361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3940910adf654138e0fff8dbe56c62a94f1acb49aafb03fc110233783f9a7185. 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/QZMEQ2329072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b9871f90254a2b2c91de4fdf85b5f259d1c04b09b2130e5c909523145598d4. 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/QZNWS2335363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb829cfee6cddc596ab1c2c12ece03473d4d206c9ff175dadfd3f2bc08330ad0f. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTAS2371547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8b789048a4811ca4a814c33cb3383fb9b588450f3ef04c07c30703c295451e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTBE2329841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13695179e36bd138c77c47b3c90cb0c055674687f7be8c7d0f7d1ee6133deb7. 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/QZFZ62476312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe957f638491976f050417b46a9511c5a553d19ee22dead005496c2af0d86d32b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZWFM2408143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe957f638491976f050417b46a9511c5a553d19ee22dead005496c2af0d86d32b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:49:45Z), 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/QZWFM2408143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48306cc8f31ccfb16cfefe1a7629497cb41630eba9f6f49ef0eddb6eaac4b53f. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:46:52Z), 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/QZTAW2538545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef5e9604f6e9f228e9f09e8fe184b20c8ec7087c053cb700877a8693685a36b. 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/QZTAW2538546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72080bea20b7f608b1c21cb9609c91407bceb6e653c8accb2246a05cc9b0a93. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:33:34Z), 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/QZTAW2538547.