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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b12f7de5b50b36771917ea966aaeeef11d2cddd16073ca2ffbc8c71687b79e. 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/8659d558-bbdc-4621-9e3a-0a1f858c8d05.json and https://artists.proofprofile.net/proofs/artist/8659d558-bbdc-4621-9e3a-0a1f858c8d05.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fd748a52a0cbd065c0be79a7646109c36deeaacaa87f714d27a76f63047921. 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/ES66S2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bab3ad85be9d66ce35822b9970990a3ae24f907c1ba01f80efeb9ac0ac2ff8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES66S2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31d67bec5b7f8a2ab06d6d7c95b5629d341a93c3ae6f9a9c906e543adf830a5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES66S2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0f54387b41211bc85d05b283a32b1d85d04075da0ff5a6de1af25435d227ae. 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/ES66S2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a58ef3d523f9f9aeeef679ae74b42511acc7af90129915d3b9ac63ea2f4dbd. 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/ES66S2100014.
Canción para un final, Canción para un principio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f404f7a5a84e6c5d834ff79b6037756affee7e67b2e3531e9101456b96fa806. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES66S2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2239f25cd21f1ae035144b5953d692cc536063910f7b1fa4d2ff366f5d84616f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES66S2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281ad2033d58187f6c0794980cc0e12ebe12c1dc31aa6b20f985abba60cdc3f0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T09:01:29Z), 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/ES66S2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a1c5d8a97c04d37938d80c4a5f2ea9ebf101cf85101b1e820d1e1a668f5bc1. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/ES66S1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e4445e4d37e08d02b286c342964260c01251f896e94ebdfe59a4b1477afe6b. 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/ES66S1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300b1c034727881cd1858bad614152e7f46870b4e86c71b8bf0b2a9fb73e74bc. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/ES66S1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ab71565bbe672eba42c2f9d886281c3430d0dbc6c9babab799d1286044e77c. 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/ES66S1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe7bdb5d12efc2c40b13eda98b2e956c68b4668530a4f7d6cb67be2d2c944e1. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:02Z), 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/ES66S1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c3a175c7699e54c301a0c8c3bff4095120dba92acb53b3bcb8cfbc90538b6c. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:31:23Z), 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/ES66S1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0e486b8de9874530e0d17786b472f1a46f04252712d83c48587e5dc7cd9093. 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/ES71G1606737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439782b9027120a5782af6c2e99fa6af12a746769189f63b720030d1c54f48a8. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ES71G1606742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6903cb13063a96308b61cbb190a6f2b76a64570ea3b902d8676b11cf67ef1a7a. 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/ES71G1606743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef492fa9b2d8582223d41c256ba8fe96223e434d36af0c1c8cb92589eb6525d7. 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/ES5701900219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a02dd35866f6c257e02b7faa8887203626d79ee4fff84fe29ccbe69d92e2824. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES5701900220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c90541e36114145eccaa26881d1e728e13921d5115e3d32374b2ee62eb834c. 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/ES5701900205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bab3ad85be9d66ce35822b9970990a3ae24f907c1ba01f80efeb9ac0ac2ff8. 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/ES66S2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281ad2033d58187f6c0794980cc0e12ebe12c1dc31aa6b20f985abba60cdc3f0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES66S2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15dd94796151ab8ee0b182e51e6ed8436b3e3a89b2a1e05fdffd5c2650059104. 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/ES5701900232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27a63ebdb02d060b7f0df451029b14fc7928dc108244142679277c5c5c5e6b0. 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/QM6P42355853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb36509a91676a3d2b6b78c333c67b2d55cac23d9d11f864d3b6deb088035b0. 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/QMFMG2376008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dc18f9d64e8b7df88e7406e4b4d3c68e8a4447253baf1ab0c43de82da002fa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFMG2376013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27833c3688f15d396ed11e370c7d1fdfedc7c63a5d0df7e1cd51fdc250bb59e1. 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/ES4411800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3190ac11841e8013a50cbe511dfd5decad483ae9078465007ed58830de0b19db. 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/ES4411800086.
Contra los Románticos (with Nacho Vegas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68106582b8877993ca8957b4bb6bdd60c0ed62bf17c5fab6d3702c0c3b7d3526. 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/ES4411800088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9884b1ede8d6c1fa82fe940eb22e412ea88ebd2cb6bc00f4b184b97d9a7057f. 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/ESA011716420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7d406a7f3d6d3f433184e5c5a6d16eed1ee052ae9cd4b5c580645cdac13a03. 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/ESA011716427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd74802c6bd9a224cb587fc6eef4be69661f205e6d8fe88665f4bcebd57a37fe. 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/GX89G2277225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d64230a57644f037b186f4d3987dbe1ae27ba08ee702d793b59806b26077f7c. 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/GX89G2277227.