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 0x76a14d779d7edad9798d77e71ab4c95363eab2ad454a43fc9320a15e163a221c. 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/c2464e91-1c2b-4a8f-b451-ce4d075dac22.json and https://artists.proofprofile.net/proofs/artist/c2464e91-1c2b-4a8f-b451-ce4d075dac22.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 0x44ad23db72df36cb60a7f7397ba65b8441d3f3f677ebb73be6190e17d6839edd. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZ5FN1782426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cf99f9e71406e7890ab107302ed6550d834022d0bc97cd31f605a3c0c4891f. 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/QZ5FN2041693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ad23db72df36cb60a7f7397ba65b8441d3f3f677ebb73be6190e17d6839edd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ5FN1782426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97225db0d634d26e9e79e8d0313d54b328ee92ca4fe3bd5a3945408b2ad298c3. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USDY42063224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078e6643452a86eaa5e1bc702ac75ac6534c8f415225efa243330a9497a39f65. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZZOPM2106741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54c3411e693ac55f7a404f3eb54ea3bbf7e16fc270c0f085ed711467de88a13. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:04:08Z), 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/GBWUL2185515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cad7a2035d7657579b564709a2920cd997295d9600c25835d07aceb65c9c201. 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/USL4R2361596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc492f1aa797e15feeb19eba0a7b2a11d3db0fc85b90751ec48c26bcecd562f58. 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/DGA052415700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a38ac4fd6bfeb701b668eda3e5c939247b19c51b8a6ee7ee0dcd6d897a19552. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:35:27Z), 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/GBLV62401916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bed9e6662756ebefd25e30d28dcd42a7a0d9af5e3c79ecf3d80b529500bb32a. 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/GBLV62401917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb21a4708b82bfd976857507e8b80d8c81655ad8c7ad843d95e315104d36907. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZG2X2407019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d66db0b129c35ce781e0d83157af41d073653bc68913620b4ce6d01142f83d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DEYZ62500281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7711f62cded1e5496ab971f69341c7879a08a2cc61667605b19658aaf9fda6. 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/USANG2019952.