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 0xb04d059b2642cc577137ae35eb8c91ee068d62f5dca2ba98a524110f0b51184f. 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/3f322c93-75d0-4404-afc5-bb16856a7d23.json and https://artists.proofprofile.net/proofs/artist/3f322c93-75d0-4404-afc5-bb16856a7d23.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 0x995a54f3ab955ed940c58090484b234f065eb7ecf08b57ec5e4786b2a832c194. 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/ES05I1501262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6494d0cb1f023f4ce60bc9d6b05307236a3fd5b9573b5cd620e6e189675c57c. 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/ES05I1501263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a271d3b11d1ede1e72ef8cdda4c513e452b9fb1381cc98a47986357cc8b17ff. 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/ES05I1601321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d65ba75e6fc25ce7e79218172d718b99342b56ba997e1bd1227fb97f0e6d0d. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/ES05I1701334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed49d29c7254168f012f4d661d62c3169d15b80b2e7c757b0b597157686edac. 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/ES05I1701336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442f0bda24c6208469e33c8fb162cf2ff135fb5c494c390c5de98c2ce58da009. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/ES05I1701340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2f48965029210acd2d9d3ee0736a3de2d5269bc733b0e783caca62d6077c50. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES05I1701341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a957d9f7db4dc8c5c7dc789f3249a1e153e0cbed47f9866c0520f9db795b44. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/ES05I1901350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa298bca542add6842a40c228857b493b79deb9bdbb43083ea2c54fe314993bc5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES5152000866.
Nivel Experta (feat. Álvaro De Luna) [En acústico]
Portobello (feat. Dani Fernández) [Acústico]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a1080726e5f71fef54260bdb6f1a6a1e940d61182fbf6e276b1b09e903cde8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES5152100915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a1a3d94781ee64626056776a78d6fc440920544dd2bedcfbba83ec545f3ccf. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/ES5152200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4cd98f8ca69ed22f7e56c827cb7fcb1d547f567c23fd3cc5141269ab70ac72. 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/ES5152200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70442f9c4b12085d46404a7782fc45e384de3d82199848c055d3f6dbfa46aca9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ES5152200119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4743686d5c03808d99686e1bd92905e39a8c04925b6d05afd5e1d3755304d7. 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/ES5152200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc85786225dcbf2eefd8768e93ae127e7ec56d5b372c57864b291df9e15ebbd. 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/ES5152000125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b9032f94a40cea2b08b1908f3ac9ffa76b01344308b1a3e715ce9cecdedfae. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES5152200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa298bca542add6842a40c228857b493b79deb9bdbb43083ea2c54fe314993bc5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES5152000866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50091413a1fc185fa078faba10d5686095591586307a85e20d766bc580e21d65. 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/ES5152000388.
Solo los amantes sobreviven (feat. Fredi Leis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580535efba7948ed35b17978decb889ece8e2eee95ea67f1b4e3f554c69b9e55. 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/ES5152001242.