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 0x8ca8c33b080e7cabf5f9d5b4d0ed83b97270d058d66e8e98875e03d442507907. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4444a838-97b2-465c-893a-0bb7f79ca795.json and https://artists.proofprofile.net/proofs/artist/4444a838-97b2-465c-893a-0bb7f79ca795.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 0xdae6cb7ce2c111ad1f19ffe3a06736b1d75321108dfff5d24bf7f3b55e042465. 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/QZDA82352509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4674bc2210a02460c66c43843a946bd7ac1848742b23edd7f5d1f4492cdef1e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWX2325003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c258f531fdcb30ec9533970947b9d62a430388f9ec10df08ea987d9df5e5410. 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/QZNWX2325005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea57da942c8639718b0e4412b30942860f3ad619b1664ccb0c3dbdef78a180b. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZNWX2325006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3c80cbe3807858454d70d10f365c95ad4c146dbd540a188561b67ecafdbb30. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNWX2325007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ffd9b758166c59f8d6c2cf3916121862e0e19bd093dbd00e25fa7c8ced09a1. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZNWX2325010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88076db7a3da91bc5c6ab4c8a7001bb4edb4018eba7340ea825c71c30a6dd75f. 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/QZNWX2325012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0501e1b1346880aa75779daa85967b9f475af5065873a148318d97a767c13c. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZNWW2323007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a803eb369025f157dd32cdd6bd81e09866b5550d2e950860ff7e4276b8cd90. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:04:41Z), 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/QZNWW2323009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba78d00f2fd400363fc63b8a6a8bd000031dbc0f86212fff9d93bb0b7b85112e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:20:55Z), 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/QZPLR2345672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf00075aece968f56613133e508d3c4c2348110ccb735718ca0ff4a3542487c6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ32482200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be8bcc91b656c2cebd88595f3c8263ff2f35d076ff66ddf3c56b07649d57d7b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:32:59Z), 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/QZHN62435485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958a971c83dcd88ac88dbc857edb7be01386546de8ec1e037b0e3fe0b06423d0. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZHN62435486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2d7069a3ed2b884f9bec04eb3acc552abdcf754d41b43dea9113324ec3392f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZHN62435487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53b6feb70842a1177f2a4979a76ad62233f73de2c5c9cfe292d0899aec123cf. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:42:41Z), 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/QZHN62435489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa688b9a82849ae7ca270476620866536035150098fbb6ff2c91255d6435386c5. 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/QZHN92489999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a1d58d81ca4795c331334fec594925e8d2efbffe46740c9aff09c2731fe79a. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:55Z), 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/QZHN92490000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b280df85a494ffc6d3d5d044276b3e6ef9bdf556874f81f64ceb44f046c9d67. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN92490001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459fc1a280bf919a671548e5938c1e5fc3034b32c8178693594de0c03404f299. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QT3F22463704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5969a03732134db2cde60c86f24bc53c5a86497b9fd7a6c4299099180bf553e4. 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/QZHN32512164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a439344ae2634f35e4598ab68d763f42da1bb9148ce9598536b4b32a1c00eb. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:29:27Z), 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/QZHN32512165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c88c9c82c8c455a47653510317bfc6d12548d92238094e4fbc617d9915f8db. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZHN32512166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4f0c72eecf01c1981a45ef4a5d997aec3b7bdb145e5545af358cf7d6719cb0. 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/QZHN32512167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6c34c6a84b3643b92ee67c64407a545c6e50faa6eebd770be8d8e9d2f9be19. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZHN32512168.