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 0xe8222cd854942053079a26be0d55dff112794092bf0a32ee669a4c26d2a954a9. 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/c28b04ca-d957-42fe-a394-eb95aa56894f.json and https://artists.proofprofile.net/proofs/artist/c28b04ca-d957-42fe-a394-eb95aa56894f.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 0x927ad20481bddf024e89537785a7176caac0fc906474f857361c6de20b3057f4. 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/QZTBF2473395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb2ad51f18ff42c010abaa8c47cd89bd5b892d867441989e00f54b553b6b08f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZWFE2433841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eba33cefe36597f97ac928875b0bbbc8d21e83ee9b27c2a2d72c5a2c7836058. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QZWFF2482620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84af75a6a62a5c61b56b2a232990bf8bbd226863745c71856c1f2850088cfae4. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZWFF2465350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c3602a10a7b8abc45454eb5590919db248d2f041ae5ea1f0937730d3853e86. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:31:54Z), 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/QZWFG2414079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a71ed837569d3188986988b4e3e1cd7cb09937dca9a3828e955934313345d5f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZWFJ2444471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9020296a5fe6c47ca56bb4eae94647c9cba98eee167daf01b2dc099bcda6621. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:13:21Z), 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/QZWFK2473371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee29d415589f358a188a7a127691058c5ba2890f951db5abc8bd1fad587b52b. 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/QZWFM2425276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52be9c8c270d9ba4260809fc3b5b64f0e746835aff7cfd76f180c6ca71f09953. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:26:20Z), 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/QZWFP2409597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bd5dfa1cc7dd5172f88db9d050da7b68542aa682909d56fe740546fb9be5fd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:25:21Z), 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/QZWFP2411897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52adf821d874b6e1faf5c91cbd183902b65a4895173165390693b3340f4b0e1e. 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/QZWFR2499408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e87a47e6b2925b661216401d9c08f1087f18852145f25f6df62644ebeb8ab2. 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/QZWFR2496275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a087f2fc4fc567e92eb82c4fa6cda34af17f4663471b7cccdba084b2c36b686. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZWFR2499380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f860821d3be8fb9d51ffe78846a8dfb9af70e6681d412f59a4bc94b6d120fc. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:35:18Z), 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/QZWFU2463893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0e7240fac3584cab2626b5cec5d617f2378a068906d66ee0b5ae6bb19ca9ea. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZWFX2405363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b740e45fe6d8c7d5ee0ed1a62a1b71c06da566886cd37beb857eeceac210fa5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ792485234.