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 0x002ec743fcc0358c9fed29c68d0977602761f916a8486ae21d0c98ed14287a55. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b9a1c06-e67a-4a14-97a1-682b38e0cbf7.json and https://artists.proofprofile.net/proofs/artist/5b9a1c06-e67a-4a14-97a1-682b38e0cbf7.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 0x40dc3ce0f9fa78c8b0005dce3bf00fd86d494d9b3ed4d52dde2ddc7adde176ef. 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/PYD142000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0159c2a189b02faa16f734836bd2fa5b9189c68a85291fcf859342f71282a196. 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/PYC842303943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6268a269315ef78a09d26add47481790ec4932ff9c00c5e0dcc3ffe039972f79. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/PYC502400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83790ae43a50fca4a0ed36ad9983e06cc3baffec89d3d1c66f950e9a9dcda817. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PYC502400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e3006fda3c1a29ebf925fb298f5881dd896b675dc05540c51a5e27ab2748f4. 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/PYC842301533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f1aaab718549090f4b3b54c70f063daedf2bb310888bdfdf3c71f905cb1b53. 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/PYC502400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c7bbe0090e5fbd401a68be875d0b2c8fd3d7b34fbf47ef68e01f22a7f50982. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PYC842201938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1009b08c5d8ead95b6660f416beddcda15002d4d1e942315c1ddf885defcb1fd. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/PYC842201944.
Barajar (En Vivo Desde El Teatro Guarani)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6ee4cb4cc2f47be1fbc07646659a09c86d55ac514d5f67442af4c6544282e9. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/TCACR1693148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38aaea4f909d04e03393e1ee945ad63173225b8c6b4ddb863ce66a458a15298. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:21:30Z), 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/TCABR1336839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3253b4004eebc41c178d33a027bd2716ffc86185f088666be17a6f3c678ee1. 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/PYC842420914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f1aaab718549090f4b3b54c70f063daedf2bb310888bdfdf3c71f905cb1b53. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/PYC502400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0159c2a189b02faa16f734836bd2fa5b9189c68a85291fcf859342f71282a196. 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/PYC842303943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914e72fac9e4af299828932ffb045ad40c1d7b0caaba8cc4333865bca0872a95. 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/PYC842303721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160049ec6cb4c25bc400395cc91ec2b8446d0c7226e4b78d975d284bf17ada01. 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/PYC842302605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e3006fda3c1a29ebf925fb298f5881dd896b675dc05540c51a5e27ab2748f4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PYC842301533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27acb9112f3533d6891ace67f3fddf33fe832071f5e65477cc7d5ea1ee561a7. 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/PYC842301532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ad7a082bbd2cbdf43bc2d85b9b66b356aa77042e731f27bb337838e3d3a37f. 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/PYC842301530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d4ca37626443cd64265790462550ce6ce836d6709d2c7f8fe6f8d43d7a2f86. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/PYC842301522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda894f6c2c87638325ba3f6cc82f3619182f08e9302c7b10c53dd5ded3c97ce. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/PYC842301529.
Boleros Vol 1 (Covers Acústicos En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d929c857938280addf888b3b987ab5519027d7086ec811fb7f65a0e7fc5383. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:32:59Z), 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/PYC842201925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c73086b5a927ad4057a048fcc1af7f1cd243d0a94c3af2693f8f7be17458aa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PYB802100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3ceb9608b605656ced001dc91bd850ed00896c6e8b623d4174de82a679d78e. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/PYA602100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ff69e01fcc46b5996ccce506231d394989cf0085c992010bc14b6cb79a93d6. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/PYA602100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8b094551a3200443192557e74f6941a25edec8de9d8e3f13c30a1e3abbffd7. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/PYD022000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341ee12d76705d8e33241463e56311b8103a8b9935dd02a8b4ed0ecac1593e23. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/PYB802000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e7dda022e4e17f0be1cc4a42266b8e20b1bcfd049b3fb7eb8ca8366d9b5ae5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/PYB801900021.