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 0xc2d85b8c79c0c08f22cd9b6924ef1897508b5e43a05c989fcc5bdab214aa80e9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b01bbd23-ce03-4936-8abc-01bfdf3b7a6f.json and https://artists.proofprofile.net/proofs/artist/b01bbd23-ce03-4936-8abc-01bfdf3b7a6f.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 0x0d22aa070492a4d83ef6ebb47e2f2da9f43f4e72d83f4150a49aceaeb3fcd002. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZHNC2000973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903b8658374479d4c663dee6353bdd90561ef592839b571465b3c0263ffbb9b1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:45:00Z), 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/QZHNC2000974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dc1a9877ced6f755db75eb84c425af594348c7e4bf0fabbc573542149bd97b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:47:01Z), 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/QZHNC2000975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ac7e8214a7a84394897ed053b8e50bc5cee2deed64b71df1ebd9726d10721d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNC2000976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b10d8999a1574d6d0a325c9eacba19b0f68776f0a95c2dc2c0f8fce57bd83d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHNC2000978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9a2205e3ffd0309113a5235c6cd5061fbc27e52be6a2ec9cc83bd8a153418a. 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/QZHNC2000980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c56692dd2b8c359dbbf047661b121136b0c5d6e0b80fbb6c437bb8c634c2cdb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA82267322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2ec6961d916a87f6e6fedddbf84a962179612aca48312412299d17341420be. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:05:50Z), 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/QZDA82267323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69b8203b2c7f8949fa0731f514ee0d8b9204e501abe326987fa87af6aa7cda6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA82267324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6640a24b5dfc63964c685ddf96ec5255e0c0a0c4512e38213bb48f0d070eea8f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:45:11Z), 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/QZDA82267325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6a832b36eed30331b2359b7c61fe54b82aac2211f4d3ef4bed1c836d32ecc0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6M2471132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209443972be2d55c93f0ef8caa0691a06710d5c18db78632c756fc2f7e3de6ad. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZHNA2540962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93640f2dac4d2e128098f3647e54e2011e649f2c3ab3bcad8fcf82b01346ec56. 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/QZHNA2540964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e254e999f1a9b8796ff56a2f45499dc0467b83fd1d44b295bbf3e07fd0dcc8. 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/QZHNA2540966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ec1046b2f25b6d53b5da0b4f85c658bda203653d7ae1c6bea346f57aeb1856. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZHNA2540968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406f436acc69c10bd8ad2118873d557cc4e767983cbba69c9be3a20d92cc7988. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZHNA2540970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb89c3ea07dc78569d03ead8ffae972af14b8063ac86f0c9df5abfbef4af060. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHNA2540973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68be854e11e49a8466b77d2acdd00516d2cd6b5c7e00b4e71f39c36998116e6c. 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/USCGJ1647097.