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 0xa5d9bb9036ac38c57bcc97a97ee32655e99c8af3406cb3299b5b43c998f5ba54. 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/3935d5f9-9019-46e7-b2bb-2a1429f70296.json and https://artists.proofprofile.net/proofs/artist/3935d5f9-9019-46e7-b2bb-2a1429f70296.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 0x3ccda2cbdab391df16475111d2f9e97f9ea84672a7e3957e338c84feaef04a17. 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/ARF411600141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec17c74ac1c3400452698f64d1451d59c5612530baadd7cb0f23f613eb6b6dc7. 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/ARF411900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310e9f713d5c6b158ee2b3d4855cd137c1c9fa7a6b49bf3c2db688cf19d480bf. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/ARF411900169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9f1f3d805067d12f80a7bedb44f65d4e70f50dbbb5d1bb91f9af80a1150d92. 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/ARF412000237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebc09a29bf83d619abe34afbe7a4cc1dea1314f7cbe4221e10fb7e8e94a6706. 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/ARF412300363.
Vintage Café - Lounge & Jazz Blends (Special Selection), Pt. 11
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccda2cbdab391df16475111d2f9e97f9ea84672a7e3957e338c84feaef04a17. 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/ARF411600141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccda2cbdab391df16475111d2f9e97f9ea84672a7e3957e338c84feaef04a17. 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/ARF411600141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4428fd8b9fc7152dc749456349abbf517b044e37e380faf77f2028af32254afa. 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/ARF411600140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634192f033eb5b5b67f006741e67f7bff683ab95f709cdec122e1a52601b5339. 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/ARF411600143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61717fb5e09fdcab63750366171e95b3c2fde8c821d3834f01932ded417a2c4e. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/ARF412400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28fd6dc5f91e5632559a38d75bebd9c96290737b28821ef77b7f09cc03daafb. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ARF412300443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28fd6dc5f91e5632559a38d75bebd9c96290737b28821ef77b7f09cc03daafb. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ARF412300443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebc09a29bf83d619abe34afbe7a4cc1dea1314f7cbe4221e10fb7e8e94a6706. 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/ARF412300363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa214da244813ffb2da2ab6caa092fecb8674ce25ca1b0b4ac8886b1726b56b84. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ARF412400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a5c4106662f007cefd8b35e046a4b3237b0c4b481683b13d87b81e6c137564. 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/ARF412400227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155fc6b0fab51b8bda0fa0e052aaf6d5383454f390a3c97d5d0ebce77bf02dd2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ARF411800182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ceac7adcd9b7dd247e02bc84b05c4b5745da724a6e86dcd408734f8ef828e7. 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/ARF411800192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec17c74ac1c3400452698f64d1451d59c5612530baadd7cb0f23f613eb6b6dc7. 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/ARF411900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155fc6b0fab51b8bda0fa0e052aaf6d5383454f390a3c97d5d0ebce77bf02dd2. 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/ARF411800182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12786869babda7ee7f4ac9b03fb9b715c8c9dc59d3852554ff3f7f0bcce6b029. 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/ARF412400279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c683ce560b52f94eedb20eb2cca3f7bcbfebd28b7ac4a755e7d8fcba66a253f. 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/ARF412200284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634192f033eb5b5b67f006741e67f7bff683ab95f709cdec122e1a52601b5339. 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/ARF411600143.
Vintage Café - Lounge & Jazz Blends (Special Selection), Vol. 18
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9f1f3d805067d12f80a7bedb44f65d4e70f50dbbb5d1bb91f9af80a1150d92. 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/ARF412000237.