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 0x721064b6543f3f68c091ad344dacb4af25ce9558acdcbc581a0fb888207faf29. 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/eefc64e3-853d-42d9-9600-051ee5f6008a.json and https://artists.proofprofile.net/proofs/artist/eefc64e3-853d-42d9-9600-051ee5f6008a.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 0x7ae33c64e881c5d9f75a99faa355dbd963a308bcb6086a83dc5e5051170ab199. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ATFR62000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4163ac9531711e8d9edd5076a41edb86117f00159ec5bdf9d32b09c7edf4004. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/ATFR62000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0b8c4db98cb2139a4af1c5819eec6190494b19bbe2f428d35524e8ecc03899. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ATFR62000035.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e940ca04671fbce4755ad70fa6c8753ddaf357ba7d480e419163ea37936c4e. 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/ATFR62100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9ff4112170c07ccabaf927ab5f95559af6cb229428b5cfaee216ff2c5a9be7. 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/ATFR62100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8c64ab65a9a514f833a3b9905889f33ecd1b3f7eea383b915eb87b605fbc47. 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/ATFR62100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cebc71aa37f16b9b13a408e3671fbfc6ebc7dbb1b671ae91857375afc74098. 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/ATFR62300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b395d51f6de385e4164ad93c7020e39a1acb21ebe812ebf7eced390c0784aa. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:53:16Z), 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/ATFR62300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05baf25017b719b38d7eb050c13ed0bce5a0ec2aa5607c4ec500cdd1832ef894. 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/ATFR62300038.