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 0x9ba621c06e81b2c7bae74c37530d89935436ede94687a0a1983b6d60eb70d6ad. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc9dc298-ad4a-4d0e-a615-5e7f5035fa52.json and https://artists.proofprofile.net/proofs/artist/dc9dc298-ad4a-4d0e-a615-5e7f5035fa52.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 0x6c753070fdf24bea8db55763d0d408cdc38f03a06fe86904b3ec0faab6709e80. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZK6N1982439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f8650a4184a3197ab0100520ad372c2646ee22abf978b047bd972a8665088b. 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/QZFZ32055438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6a9071d2fba5ad6550223b9cd2c767cf33b0aeaed0dad30561d716ad396399. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:43:17Z), 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/QZES62032962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff21b52c8182aa0b04d734a99126f2ff28f2f156a8de935c00fa1afd6abfe800. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZK6N2030756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97785d07ee3ccb25e25ef40e378c27a203d12d1e367d5194eac4730dbd635e5a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:37:51Z), 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/QZMEN2034449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399d1f21d645f17fe4297558cfd58ea867290da0872a193a49d1f44e8c26976b. 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/QZNWS2091681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb963c0e6712e2080c093e0fddd82b730e171c45be25d3c900fad92354ff5dc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWS2120254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd570d5982af71485028362890d066e9a287669b17ab09436d02de2ce31ae75. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:52Z), 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/QZNWS2120255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fe3851262e650a35abfac142df17d1a7c1af0592224fe56a08985f007c2eae. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:36:38Z), 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/QZNWS2120256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6141417e0c8e75def13de5f6b7abd0247623fb2122b2f0672b14baef07ba7fdf. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZNWS2120261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762ab79dbd402817687f77810391443afffe8b0baf32b49e0b9fb292a13a39d6. 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/QZNWS2120262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa744674c1da6b72f7a0988da54841a4e7b063eed926400ccfb56cd6a69bfbfe7. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/QZES92231325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed9b46b86ff6409d99a721d4bcd843fa31729b19daf7f906fd7d3477d3d69ab. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTB92264163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a878aded12f91c309032c9caaf10ceed37ea81e9d6e4dcbda320e35625c212. 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/QZK6P2371106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cf2aaac7f7ece1f5c59b409acddedb26367a5d24fab8fb21af00a312a568c4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZDA62473385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c12536608c84183e7ce1007a049051690686de51e989423463ae606a8b7313. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHN82441274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad338e559918a4c3d1045723b082c4d1f50ada06be4f6b216a7c6a10ce44359. 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/QZWFM2427093.