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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e71db430e7030832dee1618be6aa09388e1411830e783a1f849476de32a42ac. 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/161c0634-747b-4d79-b891-f13eb545e4e4.json and https://artists.proofprofile.net/proofs/artist/161c0634-747b-4d79-b891-f13eb545e4e4.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3094459ba0fcb29aa7358ac75a84f5f0d4558afa2ba057d1e25ab99251a52478. 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/ARF411401083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0f606cb1ea5ad497f1f95ac2337810311edda132a63558b497dff16bf501ee. 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/ARF411300995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7966889ab922c1a0949d76dae9e73e5b100337ebcb584bf475414421be318a97. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/ARF411400350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9921e2185f03b34cff9c11140e0b90e7ed75a30e06c0b35556c0efccd1b6e1. 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/ARF411900206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8852889d226631d8f4187eef30eb0ec345932d9d915aa39b96360e421f0f8c44. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ARF411900411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c7933eb6470bf10527f1c54ee59b20465021d61af42ad134b6d3261cb1e5b2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARF411300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b783ad9c4a2083ccc5c2941119f59853ce38ae15feb30c6ebab65946befcd5e. 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/ARF411502116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c7933eb6470bf10527f1c54ee59b20465021d61af42ad134b6d3261cb1e5b2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARF411300277.
Vintage Café - Lounge & Jazz Blends (Special Selection), Pt. 9
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7ad036fc4910b3bdadfc3c42beeea6ab8aa5e630045eb80fc23793e36997e6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARF411601225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3094459ba0fcb29aa7358ac75a84f5f0d4558afa2ba057d1e25ab99251a52478. 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/ARF411401083.
Vintage Café: Lounge and Jazz Blends (Special Selection), Vol. 12
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7629ea9dade432e147e57fd79b0fc8cf64e214c917de9e06e80180a85984a3. 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/ARF411800054.
Vintage Café - Lounge & Jazz Blends (Special Selection), Pt. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b783ad9c4a2083ccc5c2941119f59853ce38ae15feb30c6ebab65946befcd5e. 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/ARF411502116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232c88efa656ef9f0f7d0149bbac532ff39867d5da6b70b75bdaa8e9e78e7c1a. 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/ARF412300446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c7933eb6470bf10527f1c54ee59b20465021d61af42ad134b6d3261cb1e5b2. 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/ARF411300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d223d4b86e320c5b2c6e70fcb19f4160920229f3cb02620e17e6bf4f98ea154. 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/ARF411502574.
Vintage Café: Lounge and Jazz Blends (Special Selection), Vol. 15
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31311465b5f3d1d83031a70b023274a593a9a776196fc96a1e4ec76a27c7dcf. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ARF411900205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8486ab65204c71e38bbcd204bdf8f0a3e8ffcf2d9712a215059eb082b89c357f. 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/ARF412300023.
Acoustic Clubbin' - The Complete Sessions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0f606cb1ea5ad497f1f95ac2337810311edda132a63558b497dff16bf501ee. 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/ARF411300995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83b28a164ac3840cbd95e491ade245f6e6052b62fcb74b3f5f72a7ee61d6e82. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ARF411900288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c7933eb6470bf10527f1c54ee59b20465021d61af42ad134b6d3261cb1e5b2. 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/ARF411300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd584fce7cb4601b7a1c90f67bc314e421af380cde390cc22429871ec774e1910. 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/ARF412200196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c7933eb6470bf10527f1c54ee59b20465021d61af42ad134b6d3261cb1e5b2. 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/ARF411300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0f606cb1ea5ad497f1f95ac2337810311edda132a63558b497dff16bf501ee. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ARF411300995.