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 0x269ea5540c690a136eb48953ee8b89b04a97abe2e46ec5b2c889ae4ded35531b. 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/08d62aa5-441a-49c5-be8a-a13f3416c9d6.json and https://artists.proofprofile.net/proofs/artist/08d62aa5-441a-49c5-be8a-a13f3416c9d6.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 0x5bf3b6457467a6c803f1e80fd72524a915e7314f910bb0083c56b31bbd3f251a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ZAQJS2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c72be6110d5bedca5ff1f3684d3f7113444223e90408b25a4fa74ac240f20c. 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/ZAQJS2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383e8e08e322c20fb0a74cd857955a3971656482459f16ff86e2f353fad2f8d8. 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/ZAQJS2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd63089863c1ce047304258c88339b029e8bb52a500edd16b76b3244b243d29. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ZAQJS2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c18c461e12cb8b9e7516dd0ef19555a97e0c005e36d9941c5f9a7f0354b1f5. 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/ZAQJS2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49263e67c355abea1bbd60e40a251e691d029b57d468c4c4de78ac29f028e907. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ZAQJS2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a385cca50fc28cc34f19eef2af7946e073f2aef94fb4d0f4d65b5420730aaa. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ZAQJS2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ca908b5feb07fbbf499a726c100a7492006cbe7ede43e9a2cd1082c87e3ebe. 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/ZAQJS2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c98e0042c5431601c7fc92490af6f0f887138e99cf52dba19c357ea2957bcb4. Chain 2 (Bitcoin): anchored in block 957541 (2026-07-11T08:23:18Z), 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/ZAQJS2200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6275bae7f6702c55e26cf6e86cf4c0a407739af94dbd6be091e84ea340f0bd10. 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/ZAQJS2200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504b8b5d06bbf58079ef9865c410abee87dfdf3f97c728834dad184d188bdc3c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ZAQJS2200080.