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 0xf5b5910ae5b466be959a7d7e003d96d3766f6805d558c6e42af27eadf1b65571. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/025a5d11-abc6-4c58-8669-fa01a0903bb5.json and https://artists.proofprofile.net/proofs/artist/025a5d11-abc6-4c58-8669-fa01a0903bb5.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 0x6078a070c3073621b53068f58a9d1a6e8d0b558f57f4e573c6fbf2cc2970a8ca. 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/TWAE32400726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da14669b20a34e0aa26c8db26291eb378fd0b64e107250a874158535c325322. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TWAE32400725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efcb96f9fb06b0121044683361142089f7efae23d1ef2cbe80ffdd8caffde29. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/TWAE32400728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcfa328b6f346401821e8b097357748dc025d64988c44a34742e3382292092c. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/TWAE32400729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614c66d99a289ffd52f1418d0b12032dce7eb484fc2636e8bb9556c5cd4e8bfc. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TWAE32400730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8b12683ae4969f31925cbf24f153f1c951ce3fb885ca50a66e422506c9c56c. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TWAE32400731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0076461cd82396ea943c00bc82be4813417158730842432ba7c233b6f082e6. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/TWAE32400732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73a1c6c5cec01b3027046c13df82600ba8a1e59d5a9e2be11631dae2c37f45f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWAE32403717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba961553ea55f386d07ad71148e0b860d920647300bce8b4035c8849a998959. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWAE32403720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a269707e87409cef7641449661dbe5fa506fd040e3b8215b9e3c4d5872f3384. 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/TWAE32403721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640c859878780b1fb6e6d723429e6d75bc343b2a003699f9481105f6e2cdf049. 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/TWAE32403724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23457f418e2ca42c7c75339b983d524fb1b52ae5998d228cbdd5a7ed9f312ed. 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/TWAE32403725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6656f106f6bae0e0b7bce25f63ea5dcb72bc5f4df1a5007eacfffa40f1ceb5e0. 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/TWAE32403726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bfb8bfceb13f86a5fd6c0303d6e4c233a5b8578659b33f08dd449df5505075. 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/TWAE32403727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91132851941f88a36b5690fc3ca85cdaf7599af0da95d18fcd36611a64fb4a3. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TWAE32400894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1ca462ed07ada50cd73c59f1cfd810c1670e8eb30f22114e9a4304d62f25da. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TWAE32403715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd92e5deb7cfe9b4c268c50a0eb44c4b00bd1e050886ca25998e7bb73c9db39e. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TWAE32403718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c8a7a8b2c80e6c35fe7ba7fede8a9d156be5328074ece1cdefea544b23765b. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TWAE32403719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85bb29278da4204c6bfe3ec9e3cf3fda60f9061d2be33378478164c1f4e52b0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TWAE32402967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4c0bdddc437e6eee3bdbd9ff2cf37a918c09f18a63eb142826b122ecba079a. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/TWAE32403723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1a0e221a448ce470fe730fde7c313607807ecd6cd8cf4417a7a7dc35e746e2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TWAE32403728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13da3329e2bfa1512961df151dcbddb3a4395024337eb340ee6ded2886dada0c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TWAE32403729.