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 0xdf248b87bb466c570de994566a46ed77aaea874bf84dbc45d6746eea88bcbe6d. 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/44d29fb1-47e9-4468-84ba-17bd99343917.json and https://artists.proofprofile.net/proofs/artist/44d29fb1-47e9-4468-84ba-17bd99343917.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 0x7d0e369ca1b974a735e202272619212f08ba52a3b1496bdada73d155b21a82b0. 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/QZRP52388698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccf444f0719a42685ac7faac428d5d7a39274d90d699d34057fb34a8f6796bd. 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/QZRP42470485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63776a32c59c6543bdf4491b6839655b21143e9ac6efb2861c88bbd33667761. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZRP42470486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5af104c862a8169096d88672dbeeb2357648ddf53c3569faf9ba9defa10e649. 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/QZZ772460276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cc7ba1531453077aeaec0363a7c5035a0f0648dc10c166599a8f1cfe9122ec. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZZ7P2471677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd724a06f21e66e339eab5a04ed0a88a3e3946ea9aa23b3c89c2897af31c70f00. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:53:47Z), 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/QZFZ62505438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4833df1babd290d817bb0f7d01fc07f36d7a9c2a4d00025d0ea78cb78faeda59. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ62503550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e1350821ab6bbebad7f312adcc619ef7606bedd50220337d1ccfe18c9c6469. 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/QZFZ62503559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e5a667b7702ccd24857676ab52f4ca67b7fff45f799262bc1c934bfa17aa7e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFZ62565833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e2db0fbe4135ed1cf105c34a0b299a8e0a56df75715ae20c1cefadf87ca925. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZFZ72500362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1c7c43216c591bb024bd4aeb0f3f44afe04f9bad5eff3cfeb5117b3f9653b1. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZK6P2564609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2491655ff035a147f29683bd852106a73d3e25a5a5198bc4e955bab15dbd3aaf. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZK6L2588290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3750674f42261fcb43e5fdf45bc8434989f1cabea6c5473f51e15d4370ad79a8. 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/QZNWS2516083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1afe106b62297de764fc76a46f0480deed567d5b26e633c117fc92d3dc972d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTAW2552533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bbb744fe70c66aeba30411009516f35ce6e40c0ff4e695911cfd0a74e0b078. 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/QZTBA2525374.