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 0x29f0b64b5bb274de3f420c964f2ce6d175a9ef549bc1a799aaeb05ec2f73d8a0. 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/f98b83b2-ca1c-4635-bc7b-f7c5ea14b535.json and https://artists.proofprofile.net/proofs/artist/f98b83b2-ca1c-4635-bc7b-f7c5ea14b535.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 0x063b19acd73695e67ff8666efc951faf1199794111d2879d056b4c4499667113. 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/QZWDD2357137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172e327d50c6b1a4b7c02b896252010d7b8342eea948c22dbdd30e2b707a6bee. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZTV32399837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e599292832098da8b88a1a44a775ec66187debc0ce867222c6083b0fa5c5e33. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBWUL2390474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890c0ad8876b6348aa7f436013c4d0a1570809bb1bad675a18633567c35f186c. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/QZTV32321888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3a0c438ca59dcaeaf65e52480f90bc94e40379adbf8f729a6875cc23968d23. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZTV32317571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721ad025e7d5b191765ffd3844753322b3b4b6349f8ed63b687c4e80d3ae18dc. 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/QZTV32317724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b747ec0ff4f877ee7fd9eff73b8671609f7baa658a7a28b84849f9b93d4309. 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/QZTRX2320827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ed9699c340c395d337de91a8a5d5097fe531c75e7365fdbdf15adff4022e84. 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/QZ5FN2368075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe208968976af0079d8debd65d159a05f2e0e5f37dbff1ed5cf61b2edae60baf5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NL8RL2432034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0202a53f8a3a3595e46a243277528234e9bde0522dd9ae253bcb3e463042d997. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZNWS2437770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23025f39b8c59d952fe51f3ca0b3129f05a44e7899b69f115edf65a79cba6726. 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/QZWDD2421699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2004e3aa2c588d19ec436f66f19afaa7255f79f8cdc52dc527e6e85e853d32. 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/QZMEQ2470155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcd16b06e4894e2dc007a49b5e0af799fdbcf7a7215dc9d996b0d36603c7325. 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/QZMEN2470403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98513c49c5e3378d783ea2c23b6fe9be4ea02600236e8fa8cb0ed974780f420. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/GBWUL2498048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028236c613f839114d1a8bacebda4f651118fc053fe2820f00cd6dbafaaae0be. 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/QZTRX2408748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6f576e9e9221e2deec21521875da80fd072685bf41079358b4762aa6acbbdc. 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/GBRKQ2391319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3dc141b4e00ccb47878637a902805caa2bd12933c25b07fcc4d5d76c4f23c6. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZZEB2351041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a67e475225793eaee7810ccfe66c4afe513ffd460376ead6ec361e4cf4b8cc. 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/QZZ8B2389293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7595aea4b3dfde3c1bad35c1f7e64cc33337e54b0f3fa35da6ecb848cc08455d. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QZWV32386265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9545d284fdb9aceca2155e695c777dcfb142d95d2383c0e1d1bf6259bd3cd9. 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/QZWDD2388768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ecd2f61f6fad8cc9ae13042d2eda70b3c45f8ba6a367a66e9cf27cf98b9c79. 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/QZTV32376968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca7c41ab53b63b44c68d69e3bdff08cabe20a903f193a4561ae2073ca2798c3. 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/QZTV32362835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c80055e993458992be855e767dde0cebf95939e7cf2ad8f8023a7ea37f38c23. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZTV32328291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b426e4e8cbde1009f1fecb89936c635fa77111210e5070c6f78623a05b7efe9. 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/QZMEQ2383453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1ace20529ad18392e5463f471048318577f8c01b482270fd35df0f85128f04. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/GBRKQ2361557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc023740084d60d3bd39dbbd85cb6058b1894d3311e1fc0b22b03584c3b24276. 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/QZK6M2363499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f5e0767c0349759c16dfba6289884bca4c737e984823bafa20a9cc240b2107. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/GBRKQ2361567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40f4262fd9dfc1bcc7aa82c026d1635420a270d8160b410f63049d57da2b865. 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/GBRKQ2357404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa335ae161cac58f291889b607ecce3651c56c0333d855d95f85ee605917c184b. 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/GBRKQ2324799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c538f848c95bf87cddc99d70cf17112d412ab80bf0a96578550f521488c607. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USLZJ2381824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb055d9759802f8f601fef5c036239d3bc2296e2d9be219c0f35864ef45b5056d. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZWDE2259575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8808582dafed3055fad99e1ee6afa323c9636f67f46e5853dabc8b48c10486f6. 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/QZ5FN2321048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea11fc2eb9892468abe11060820cdb29ef60c59a7c6b55080b7d62a8341eb27. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/QZWDE2250188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8688725ce88e65bd8fca6ea947e8f4db658dd86054f00ec7a96ec797c843a67. 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/QZWDD2240752.
Niveles (with Martin Lora & King Kalibre)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb263bb6f33f113ded985b48843d71299dbb876de0a4157cd34c572c64572da3. 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/QM6N22079063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68cd39aa1dabb9aa7c95d9f01d0b2c95b6668e91f49f8459c8f00fc5dffe129. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZTRX2110457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856b9497fc8621e9d7c0e20f4df616c634820720f3e407393ea6fd76b6c6df6e. 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/GBWUL2239249.
Se Te Cayó (with Bulova, Bulin 47, Ceky Viciny, Haraca Kiko, Tivi Gunz, Jordani & JS Producer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ca4ee359dfd4578d766c9e2f3dc26ba080c727fd0b1e89c88a055675d644e5. 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/DOA631910037.