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 0x09a2e2ef9da3a6430a4215d1562a1299058f5c65d3bd610baecc10e0451163e0. 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/b290da1a-8087-4b68-bdd4-e8c432b57f78.json and https://artists.proofprofile.net/proofs/artist/b290da1a-8087-4b68-bdd4-e8c432b57f78.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 0xe8e165e16a111fa7c6c4ae37a444a7fdd88cfd29b9b25b2c747b29ac91c8783c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ARF412000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fedbcaa7bd5d1e2b4b36b42a24c6a280e333d04b728187379420a29a88cc0ab. 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/ARF412200306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd5cf7893d226c515cf8fc9969d4d320975652db49e7b04b920c4155a066436. 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/ARF412300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e57ba4066a1454f75585d28ecbaae3c3fbc7756299e4ee6305371871e963f6. 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/ARF412200158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109a655ee5dafd5e9ec3347cc0d33603e631665228a44030ac25c732ee5c049e. 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/ARF412300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d05dd88c07ae81a4121de1f2bb381985fa2c0448dcfd573f6d833c7aad57a7. 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/ARF412200159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70f3c76084b4e2a98265a4f01813a25c301b47203502e98519d4ec65a2dc66e. 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/ARF412300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75b9bd800f5a211edcccba0c58a7d97feb3b9c2835bc0faf7fed07317b0e0e3. 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/ARF412300192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86a5006d8f03d037b2a3624d0689ed2ea1838fc98c25d57d4cef0ee0efc39bd. 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/ARF412300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a48782955373080ad69d74999a546a800ee7444858b2487378c32bc9fe1e20b. 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/ARF412100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80c18efeec8a12ca9b734f9b40d159b51ea976730f4b343c70f0548d764d278. 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/ARF412200392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342558a3e53af0be1fe87fecacb44c90f5a551f8b07cc311a703c25ddf48bdbe. 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/ARF412200312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5467e172d2c282c726e49fc35135d6e708e686d3750680c76fb8d82ab4549ff. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ARF412400194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988272c6dc99ee28be58cad6d6e84ad451b4374a994966e3e721be1ffb65f162. 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/ARF411900148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109a655ee5dafd5e9ec3347cc0d33603e631665228a44030ac25c732ee5c049e. 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/ARF412300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbf638c3f60e026e7352d14aab66811c2895ed72e98974ef03c0cfa92597282. 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/ARF412100156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd5cf7893d226c515cf8fc9969d4d320975652db49e7b04b920c4155a066436. 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/ARF412300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21a064459d12dac55630c9c4783c00e82a8070fea1bacfcbba950bb9abd8ce4. 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/ARF412300242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e57ba4066a1454f75585d28ecbaae3c3fbc7756299e4ee6305371871e963f6. 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/ARF412200158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf76b3019603a0db9828ece3374baf3e417cf68dc5b63caa657db34653493cf8. 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/ARF412200055.
Vintage Café: Lounge and Jazz Blends (Special Selection), Vol. 19
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbf638c3f60e026e7352d14aab66811c2895ed72e98974ef03c0cfa92597282. 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/ARF412100156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149238cc322fc81b1710977ada22a9cbef0640569b1b549f2012bb56ddc7a240. 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/ARF412000262.
Vintage Café: Lounge and Jazz Blends (Special Selection), Vol. 15
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988272c6dc99ee28be58cad6d6e84ad451b4374a994966e3e721be1ffb65f162. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/ARF411900148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e165e16a111fa7c6c4ae37a444a7fdd88cfd29b9b25b2c747b29ac91c8783c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ARF412000027.
Vintage Café - Lounge & Jazz Blends (Special Selection), Vol. 17
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c06a162cd47a3001afa2075cccf2d74f9b1976e5290c955167487719370e5c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ARF412000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e165e16a111fa7c6c4ae37a444a7fdd88cfd29b9b25b2c747b29ac91c8783c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ARF412000027.
Vintage Café: Lounge and Jazz Blends (Special Selection), Vol. 21
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa37ef4875d96e6b3736950afcfe98d7fffac287dc2d585bced89daabd477c6. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ARF412100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8335bbbfe08361dc92f3a8428df47bacd2dd27d29aedc21269e5ff8c18375df. 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/ARF412400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21a064459d12dac55630c9c4783c00e82a8070fea1bacfcbba950bb9abd8ce4. 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/ARF412300242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd5cf7893d226c515cf8fc9969d4d320975652db49e7b04b920c4155a066436. 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/ARF412300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109a655ee5dafd5e9ec3347cc0d33603e631665228a44030ac25c732ee5c049e. 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/ARF412300130.
Vintage Café: Lounge and Jazz Blends, Vol. 23
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342558a3e53af0be1fe87fecacb44c90f5a551f8b07cc311a703c25ddf48bdbe. 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/ARF412200312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109a655ee5dafd5e9ec3347cc0d33603e631665228a44030ac25c732ee5c049e. 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/ARF412300130.