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 0xa414a6e9cfe5855e8bc84318db924a0fbe22a88eaa731a682d320d752f46263b. 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/191d487f-127a-4ba7-b5db-19248ba1a66f.json and https://artists.proofprofile.net/proofs/artist/191d487f-127a-4ba7-b5db-19248ba1a66f.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 0x4fd5dc2906d6fcfbbe825233d3e6caa1bc2f121f29a9d33a4be35453c4284f23. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/ARF411400504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c69207431dad69d9b8c3e966e2c2e253754b0297742738935f83d0d6cd54aa. 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/ARF410500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd4009416e55b1b7640ba14c74fabaa446eb39b9a4e33c8b431c4b7a26a04a1. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/ARF411001655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2614f53f95c3398bd5444bb49bfc36f503fae7482a5c7c426329ad8bf0497e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/ARF410400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64568a1a8e075ae6547f7b0cf7ffb0528ccc83307a2924fd74a4acaa1e02e2d. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/ARF412200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb13880dcf3add4a4dfc61c838a6974fe0ac2e84a70f596442cee64e7802645. 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/ARF412200153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6685c6aa6c402590f1b09cfd1c05623dc88ea19ae845494a610d4ac02b170a85. 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/ARF412200389.
Concierto De Aranjuez: II. Adagio (Balearic Sunset Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83091ad20abe94f5d863a4218cbf75b3d48c3783aee7b7c9c45ebc740aead6b. 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/ARF411400167.
Acoustic Clubbin' - The Complete Sessions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad20f2db76e62a8b9d6e7eaa48d61dc75bcfa08c40649b8be6fd17491147eef8. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ARF411301127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636a4dbf5b2f33f1bc07c229c5bc1dadb927640119da97bedabf88a36bc21254. 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/ARF411400505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6abf3dc895c762dce2272a9b7698062edc51be02e5e6578f6c6192c8e4df23. 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/ARF412200227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60e1180d7bb61cbc92cefe1a52e33e47a8bc43a2cd7df5340301a514330f294. 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/ARF411800320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22049ca5c20b3db09f1b9f802687116133373b3110d1182673d1cb616c5bfdf. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ARF410701582.
Chill N' Flamenco - Essential Flamenco Chill Out Moods
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c69207431dad69d9b8c3e966e2c2e253754b0297742738935f83d0d6cd54aa. 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/ARF410500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd4009416e55b1b7640ba14c74fabaa446eb39b9a4e33c8b431c4b7a26a04a1. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ARF411001655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2614f53f95c3398bd5444bb49bfc36f503fae7482a5c7c426329ad8bf0497e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ARF410400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0de7aaed324f77542a69cb127f975113c47ef29fb750480ab6192f4a12e1f2f. 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/ARF410400014.
Vintage Café: Lounge & Jazz Blends (Special Selection), Pt. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636a4dbf5b2f33f1bc07c229c5bc1dadb927640119da97bedabf88a36bc21254. 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/ARF411400505.