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 0x7f80cf460cc9e58062cb78ba27528df3c2e5126e7dc1d219fdb9f003f0be529d. 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/d1fa7549-d9dc-4b68-8e95-afb31bf407ff.json and https://artists.proofprofile.net/proofs/artist/d1fa7549-d9dc-4b68-8e95-afb31bf407ff.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 0x78e516c1abe1fa4303c96b48ed8e2efb02f520a8897246c0aaa70be3d7d9613b. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/MXF019501492.
El Mensajero del Amor, Su Guitarra y Sus Canciones
Perlas Cubanas: Hay Que Vivir el Momento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3f0de7479f6fd8cd01e88f3935872889f52bd352177be4f7ed40e643c00e43. 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/MXF019600672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e93b68c3c6154a31a3471e5bc7f40e62aa9cc3524f9db9169b655ade13b91d. 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/MXF019900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c50ebaf1680eb33127018ad4c8b269220e1e6d071d12c623b75804f468d774. 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/MXF018200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e516c1abe1fa4303c96b48ed8e2efb02f520a8897246c0aaa70be3d7d9613b. 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/MXF019501492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc996b14c36b8eed6de0207a227d6727123f86ca4244e6eb9d4e2f2ca35d9d10d. 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/MXF019800911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55b06effe78416c0eec72fbc7e0aff7b3b8139af24f1cadbef9affcf1bd4264. 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/MXF010401495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fae99d295dec6ddba0051a2d293b9127fc9653fb56960b64c9015af6610a7ca. 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/MXF019601062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd32c9817fc70dbf18f63a1a920544a2819b086d44eff2ceb458c8be30c092fa. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/MXF019600202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c815804ec25b42658c1290e971852407ef40930c01e7cc69c321c7d4a2c979. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/MXF019900358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317f69607bbfbe363e929f61b59b72806cc8d27ae7a8ef7838a38a43482e1c65. 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/MXF019700284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb395e4fb033047640bdb806ab11b86f1a8aeffc15bcf9c9d7d2c65584e3b9cb6. 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/MXF019800192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd851b5c44ca07e840a68a3f54117b1ad678c078c2e8e6779f5efd3681f8b1dd. 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/MXF019700444.
15 Éxitos Inolvidables de José Antonio Méndez
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bbde4562c824655a3cffabf6329a3b8fdf19adae3471a041deeda68a37e876. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/MXF019900355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49397186ac8ff03427e85cadcdf184112710f1aad6ddf60b0e87262097f0496e. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/MXF010200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a62f9a2ad8919921e682ef47929f78634d6d33100e177c7b476565a64598999. 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/CA5KR1807863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a658f8a7df7da6bc747e01ad273226f2bdee9ea2fe68fca54e596dcd030ab1. 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/CA5KR1942268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35375a6df1f915c9c7f98a316c9178fd0f86a3a0b5b0e84aa56e98dac70e81b0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CA5KR1942285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe7827f1cd778fc808e2be4ead8656e8a2d6050434fcef2a946adc54289ca25. 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/CA5KR1807028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d0bb49319721905c83811844a13d609a346fafac8c6caf3cd0ee23f89bb6b7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/CA5KR1967804.