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 0x084b84b797f30438edde41a313489f847f634b392a0c5e4cbf4c513fee8fa1ee. 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/0f3aa90a-780c-4594-8da9-9d753b31d602.json and https://artists.proofprofile.net/proofs/artist/0f3aa90a-780c-4594-8da9-9d753b31d602.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 0xd5d148321c09ab0539064565c7395e7310501940c6c715393e64cde9d9c05feb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ESA031204702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf872375e4df9bda11491405fcc521bfa2cdb3f3710c61230e40ebd299b6a2254. 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/ESA031204706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063413070400f567b1f0b12a6d60d2b23d8ddb35ae7668cba32da50fe115133f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ESA031204708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3e9691029a77a08f6cf821217cc65d8fb9fabe57002dea41b26554ea212c88. 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/ESA031204710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134b6d25ef909c85dca141a7e2e653957e2b54419ed05d8440ec52aad8f2c7c9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ES5060863803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985c63b2e57a354ddbb079cd0d1f64032a69a8aee4bea50f5d53de331db6865a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ES5060863804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1ce8932c6b0478d0624fce03172dce9a4f9d7560ffd168630606f9d142d4f7. 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/ES5060863809.
La Via, la cançó de la Via Catalana - The Catalan Way
Rumba del #SíSí - Flashmob per la Independència 12/07/2014 Girona
Corre l'estiu - La cançó de l'estiu de TV3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fad2db4435838004a42544da3bf1bb0f28ee03722ab3e6e4e9db94391ff3d6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ES5951505027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f127a78f42ac4639299ba4f3738439c2fcbbd5848d424be3d9a5b1dc1a2a669. 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/ES5951505028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a88c39dc90271d1da987d3fd0060f045b366667a9cef65a1ba1ec087c38f06. 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/ES5951505029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840f1f559965e2eed837d076b7aac8e52515c6eb1ab7aba2640cd3d4162aa67f. 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/ES5951505034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e747ac295266af4f02016fdd71abd26e536e379e263c86a10a3fb1e8ca16f28. 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/ES5951605371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf421e1d05ffc7b94aec95a59274e514e9c886829ae9901ab44f62b40b36dd3ce. 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/ES5951705560.
Caga tió. Tió solidari de Catalunya Ràdio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7909dc53d856e9893f3fe7b536b82764fe92968989f3ff2dd88d7feeb1132cce. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ESA031900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b22d9c5eb98dbf9b9cda6118d2e075fb7b879044c34c96bfef9b5dda819e94. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/ESA031901202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a14ecc38a8937523d79705693ee4389e49aacfd6e7ef3578522887c0a46229c. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/ES26E1900801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321f9f94823918ca3ddea13c0f3f00aa1ff8f690113333e8856b08d40ad593be. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ES26E2002801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55097ffa2be7bc7fcc76727f9b81d532156d341b53c38dfdd67c57f3014765d2. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/ES26E2100404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321f9f94823918ca3ddea13c0f3f00aa1ff8f690113333e8856b08d40ad593be. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/ES26E2002801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305cae5eb39bacea9548ab30ab1729421d4301eeeeee3d277c60dca62cb661a0. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/ES26E2001601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d08960bdd09bdeddf74cc2c6ade9b4eb1c1b3193f8145e267ef9fe44fcc644e. 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/ES26E2200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569c3b63e5eca28d073d9ada970e639cbff225d3a8c32853e20210f64b83f18c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES26E2300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b69ce17289e4a5fe4a2f0b2990d8fb09538ed925ceba429a6a3a0a970ec054. 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/ES26E2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625a72bdcbe458d8821f4c112e7165965238143760738638359ba780f519e4f0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ES26E2500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840f1f559965e2eed837d076b7aac8e52515c6eb1ab7aba2640cd3d4162aa67f. 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/ES5951505034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2687db605bc2574aa4c4d107f8109025581ddb9e15566b3854699b3c2026aaa. 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/ES84D2100049.