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 0x90cbe3d7301f9d294d441e589a56f65cbd25a0490a4d557a49284db2eb4d1e66. 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/0c6c7844-540a-4dd5-b4b2-2ef9d33c90f1.json and https://artists.proofprofile.net/proofs/artist/0c6c7844-540a-4dd5-b4b2-2ef9d33c90f1.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 0x28d2f3e995e2f08521c1fae4118ac61571661c52213ec95d142bb031b41ce282. 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/QMBZ92350736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7a268497f0b771ea5f20d95e55d1f8d709411ee1a5e07d33b25483f679ce53. 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/QMFME2399882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87ec6835ba808e5ecdc67f2449aa4fd302afea449b5c1c27e04bebcbb661142. 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/QMFME2399886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea73abf4d8ff41e888b30d31a4ef275fcf567484d1bdecd282c104ab0f21ac91. 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/USQX92306855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2d86aeb14cecb7116d241eecdadac41e8a43933ba1292f32a95ccbcbc329a0. 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/USQX92306856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80a85413919466050098b1b126d30d294056ea7193c94826bddf44f19580c16. 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/USQX92306853.
El Rayo De Sinaloa (feat. Eduardo Laguna)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7707ade0e290cad09efc2f57ed662ce1855ef0e2fc371d13022f419e45706c. 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/USQX92306857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fbe879289299860136f251cb5d58e098ab542dc585297806bbfc46c7096e2e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USQX92306861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a21041c896dabbd3fc34d4d5ece4f5132fc753600744a54f6d6cdf8c3681388. 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/USQX92306854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b03fdb5a37343f2018f7a71056c373b13a7c90b75d5bb0a4dd9e39b6d7637e. 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/USQX92306858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f31da9e758624b89ea7af40f9aabedfa465598e520f0a2decf1177f1cb8dea8. 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/USQX92306860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfb28953ca3cdc28dbb4b08b97083ffc23d0a4e1107bafd160912150663d35f. 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/USQX92306862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5e07d2de60c501b47c2cf2916000e1c708cc07d21774da11f4f58afb8724af. 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/USQX92306859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55c0ee1b266c786e8dcc505c517c3b913dac0596ccc8c2e839af4cb8109e28d. 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/USQX92306863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6c357faca15733a1266208beb9e4fa783ff3bf1b499c0193307b7fe6cefc46. 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/QMDA72342406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf718fea8d8e4b0a8ef41b9631d5f545a5aaa3eb0b5e2db9d822fdee72cb09ef9. 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/QMDA62291630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f241b0e190c6a24e75b518a9ad919f67a28b818f7b77a76d2c145012b4de15f. 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/QMDA62249321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84443a46a069ae5643120da15b12b0d2960a18fe1c46e9a9296550696fe59a4d. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QMDA62249324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47878b881a6d07c95312b7bf3fc630efdf2f3f3aca72841e19a15d1a698265e. 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/QMDA62249325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419299249b8ca7df0d5c557ea032bb2c95126a5b9860095d421b9edff6a43e29. 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/QMDA62249323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5696acc8e27c47e489d8953d42deb2a9c323a0f63c66fe6604b80e506a011131. 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/QM6MZ2579595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f8b9bc536fb9a47983113ee4c039bc67265a9f06760d07097d91de66ac09df. 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/QM6MZ2579592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe787bfa35d9866915cdf063d88ccbec0bb67b78f718a44a1458be948123a7692. 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/QM4TX2583879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34d12ee808f24eae44fcbbb6417f545a085e6f0bc172eb3b4f77ae4550f8d7c. 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/QMFME2440924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61068877a3f5924c7ce7197102ae82f710fd786494da572c8211c66f4c2a22a1. 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/QT2HF2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b951ae61a0707239227fc57b4b143b022a2f5671b2fd04de008cd8fdc281db. 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/QM4TX2440387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42fb0880320626262761d044af3de3cabbe6525e678ff06e558b3b9feacc665. 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/QM4TX2440385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6508a3b2a54bbbc90174c1171e7d87c023b593773ea2d9dcaaf93bf4cb673afb. 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/QM4TX2440388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fdde8f73bebccbb1681402300b1b8d5faac1d88defd79b8531f2bc34adb696. 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/QM4TX2440386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4671d17e68b49c5b45a9d5e51c32e269939cc44571411620633939a7fae0aa9. 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/QM4TX2440389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4133fa02fc56c651477aa148698a60407dfd14b23b052d656c67f17324dc0977. 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/QM4TW2412998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60bdeaf78fe4a39921156c7a05e3d16401fb2a58e8fa3ecd8cf4f3edadd655f. 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/QMFME2309796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e6d48c08b352f0e54e20fe092bb782451c0907f8953c5a08d34f2a3319706a. 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/QM4TX2391980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8250238d074d6192e0dc5a7858b7b59c952dd3bd15e32b3bc37b8eeeb7ef8f64. 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/QM4TX2307837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e05018ef683b78df1d51345ffb0fe667c9f7d13206d388f9dab4d41a62b9651. 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/QMDA62237203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592a5d2a5d7bf0e0e49400ca36abcc6dc3b91f8bb4fb4472e6b0cb3dd7780deb. 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/USA2P2233221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe074fd49c9f3143b535ff56518f4e4e102c1e3982b5e577a193937b93225b7e2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:07:42Z), 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/SE6TI2058752.