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 0x83aaf9ab16c916a790fa81b82052b12cdb194c598ba92b4d89eafb109db81c7a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcd624fb-e04a-47fb-b155-dcf97e9f6c76.json and https://artists.proofprofile.net/proofs/artist/bcd624fb-e04a-47fb-b155-dcf97e9f6c76.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 0x841d7ad1395d7a98e05ff7cb4ef1bb43e20ace2a6ab20fb11d200943945e5aa8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN92103231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4e1efc771e93f8e470c20cfb1a5ebaf93273e43bba58dc90e45131cf094f1f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZFYX2567998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d0eb2e993a1df650e6bc9b268aca4dcb8fddc72e3ea357e66e717cc3a79146. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZFYX2567999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120745218aba8bb6d0179462cd3fe1591b4f1746062691851081adf788e72e2d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFYX2568000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c98cee0d7e0752797c18c4e2711a5c7b49aabd785c00a3a535c16b24b34c2e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:23:59Z), 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/QZFYX2568001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f8c7d8a0d85990b519be45ca783991d3f2c7e66f02b98156011a0668193c34. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:29:40Z), 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/QZFYX2568003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa175d68ebc2ad2958d5d5159c5b030ee4efd85c75bfab47a73839ca2c9d68eb7. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:05:47Z), 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/QZFYX2568004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a97192110f8c0e7624f699117e931df9251fb5853e3343868366a9d80eba1dd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFYX2568005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e092d98531948afb5633ca0716a571d9d4c890b4ab0862e02be659ecbb8db52. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:41:11Z), 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/QZFYX2568006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fe34fa8b35f42a21a3ad681c9e83847d51d26e03fab897079d35a9833027f3. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZFYX2568007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b5421492c0fb73c65c8c40d97382df66cde50f8b32fd09a2cae9ac8a06525f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZFYX2568008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20514d40e3ac5d05e36496ea18b4305dd23cecbe255acc40e5767849373d904. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZFYX2568009.