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 0xba56ddefa8c4a3906eede8ea7dde0c4d3ca5c22f0e5c2079bf9554c874f68fd0. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a68bd9b1-51c5-4155-9c84-ba9290468301.json and https://artists.proofprofile.net/proofs/artist/a68bd9b1-51c5-4155-9c84-ba9290468301.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 0x045776007dd34b07b1cc4ca3a1774694be1c15a58fae8e66b08f739a09240386. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:56:29Z), 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/QZFZ72412013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4262d3ad6c004d6e81e16c10417f2675bc8f535fc1d5686674e70e926b81ced8. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZDA52458894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363c574aa7cec4c989a4059de2db8bbeae8cddf0dffaa9b5fe9d1ba5a2955b6f. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:02:17Z), 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/QZDA52458900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1505f8e427fc7b00771075cc01970694628bc8847849b60064931e9957e39687. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:38:34Z), 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/QZDA52458945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a530b716b7f06c4712a04a80719a17b9bfce9acad7e1b673fd17e4351ed5f6. 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/QZDA62422313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840ee46c265e248cf2c31305bc651161d443ab4ecaef3c3921fde24d24ce4794. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZFZ72476661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfcda6ee3556754b9222ee0e9d7a0796066e90acc21e8c68482346031088fac. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZES92510230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fe3e8d08372252e01b5e4711b663e7f6b28d8525b1eb36a033aba8664c4f10. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:59:41Z), 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/QZES92508404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1758ea0c24c5547bf7bbd72cddb0758eed9783e6ae54bf4a123cba511457c4. 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/QZES92557962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2514f7a28e7872b9a8d7b5e45ecf59b735dfc661c3e0a260499d3677033ec4b1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZTB92547940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604f0b6704ff3dcac2d707fc5c23fe4eca8e7ece0d7cae047640702db87e1c5b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTB92547941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a48e3fc5ce222d81b28d0995f8515b060faf06d81cdcd01dac004b3170eeb43. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:07:02Z), 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/QZTB92547942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c430cc9e1cc1bcdaef0404b68a2ad2b9b2f7293cecad9737e590b492d84cd27. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZTB92547943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2aeaf8cd9b48bb2e4e1d66769182dacbd3f6080ba92a6be1dc8d686e0e9cc7. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZTB92547944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a5240a928f8fe0300bb60d0a89962af705f156175405713e32dc743286e376. 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/QZTB92547945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbcbd4221ee0d17bc174302631f490e3db8003f9399273b7968c18100e05954. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZTB92547946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72545f2b4289024e6f37f97b86aa32d951bfa1d9cf91d51bd40061ac5e41e231. 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/QZWFR2591707.