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 0xd1b24b951667a2dc69830da463aaefe3b1bb3db0c838308c2f3fb0cf184376ac. 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/6eafb0fb-3a23-4796-8dba-439c782b523c.json and https://artists.proofprofile.net/proofs/artist/6eafb0fb-3a23-4796-8dba-439c782b523c.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 0xbec1c64683c10ec241e3df5a64cc259600969bcb2ef4038e777dee0db3414056. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DELJ82056605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3214dea493494c9f11296b4a225e40a5065651dd6bd1516393946550397a3a73. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEZC62117589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196302ee9e4161ad0c6f691337e98461dfdcc7253f34cbadb60ac93c2ea84666. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEKF22201303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0579ab725a19bb350ad5b23af5e5b6c0600839ff27a4044a66a753f52c19b2d. 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/DEKF22300478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b947e85bf1e572f6226d64fb13ab2f8f04c6a2ee27c605a5bace2e563483d5e. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/DEKF22301496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab4d39c5533ffa0ab2ced4aabad01bc7f9ba26cf0c47e8eccd8f999cd976e81. 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/DEKF22200746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b947e85bf1e572f6226d64fb13ab2f8f04c6a2ee27c605a5bace2e563483d5e. 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/DEKF22301496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d6a45b09faa2c4c4820294b653fae267a77d34633db2d64ab5771fce579a92. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/DEKF22301546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb335a84a4ac7f7b92f2fad570143d43c0545159e35f93e2f86f6d814d4a3625d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7812349894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888253491dec02a0d8f1aa700e0cf4b74627ca00f2ecc8fb8d923c1e71cd55f1. 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/QZNWW2240047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972a4cdcb97d9e4b0346204fe7c59c9376f1b73169bf3feee7c24391d0a560c7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWZ2218207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40ec2851cc9c714899e2bec2666511eca82ef9ea7a3b8812671cbeeb5865fd4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTAS2232625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b1cc50bea947ffd4c81291fb345cec79da9c0d3e3eb48352e2490a60f4aedd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWY2202798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972a4cdcb97d9e4b0346204fe7c59c9376f1b73169bf3feee7c24391d0a560c7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWZ2218207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b1cc50bea947ffd4c81291fb345cec79da9c0d3e3eb48352e2490a60f4aedd. 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/QZNWY2202798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888253491dec02a0d8f1aa700e0cf4b74627ca00f2ecc8fb8d923c1e71cd55f1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWW2240047.