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 0x2f966c87cff30b4d2630851fa04832cbe2caa1b6521dabf0a304b2a920ea5cc2. 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/25eb89a4-06a1-4f94-988c-a08c9e7cb505.json and https://artists.proofprofile.net/proofs/artist/25eb89a4-06a1-4f94-988c-a08c9e7cb505.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 0x56d23fbcbac84d61fdd3ddb402a1fab4350ec0ac58f45905dd5628443a6d78c5. 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/QZTB22234223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c24d541614553899e1ce302a48bd35adf6ca5afc7b34cdbbcd4683616ac419. 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/USA2P2343965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c24d541614553899e1ce302a48bd35adf6ca5afc7b34cdbbcd4683616ac419. 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/USA2P2343965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886c3c00314ae2b0d222323b0b66e41f5ef6312751aa41a13d0923afc05ea9e0. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFQ2355058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976717c0ff1af3b7677723c5f9013b441ed4c698f382c79cd365a171b5eeb6f5. 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/QZZ782426875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16ea8c57e86f2ad8b7023cb0e170b05d5fe681dabb316438929e37a82586861. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ792489224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4454be8a8dafcbf739e2124fed585e8d8b00287fd8dcf0db1cb42917702b3f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QT3EX2489514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4898335150159e5a0df5ddaa088c3afcc03491085ffa554929ed7f41704b9fa2. 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/QZFYY2525287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ac5c65ac10995494a548c5f5b31c9d48911bef290e2dc4d8cabdadc6417d13. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:02:33Z), 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/QZFYY2525290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0596433e93f9afd829b13624954bd4e254dca6357bbef818c951c66b493301. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:06:41Z), 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/QZFYY2525291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18246816300934761f0b20b54cae82905347aad707ac33c726e06877052dcae3. 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/QZFYY2525294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d2dc07de88744bde9f39e7e7e8be5264a33a2af33ff3d1ad259761d904292a. 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/QZES92550854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85179838b00acde78955a242ed0c7d6131c7251e70d6ba63ab4c69e83c8e228. 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/QZTB82551770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9779a78243d3d417be5911f3078563459c7fb57c73ec2b6225582e17bfb9c8db. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZTB82551771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a0d8cb08753f08a56b11f73ede02b5228f8664e0fcb1fbe8bab282fe730d22. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZTB82551772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14009a1974946e0b4c07d4a4755c90b5a8bff9bbbc5b6de830e615a23ea47dd. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:24:18Z), 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/QZTB82551773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5f566ac205f5447ab7cfae9280d1b14dcb53d46deaf8de43b7224c60d25285. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB82551774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3b846f92613e42aa50435ec788814aaaaae6b9ff06ae21897862e18d448670. 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/QZTB82551775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1460676b1323ee2a21a6eb106baaef9797d18c84fa17842529f683de8c85f8ba. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZTB82551777.