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 0x8c668ef9a5aa17a457681bb0c98d7fd098b0f26a410d12e709c6b176bbca612e. 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/d6e56734-8f52-41da-83c6-65141b9ad3c0.json and https://artists.proofprofile.net/proofs/artist/d6e56734-8f52-41da-83c6-65141b9ad3c0.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 0xe93d1446a16aec0159709585425145aaa6bdee587aee6f04974141968f405a6a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM9WM1900173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02868e7d7020367b076320b8083021e2844ec1dc60af7814a236696e2448bff4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM9WM1900168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e159304245b4d492034b984e25f506823df248e3db5762bc4264c375c0fb68. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM9WM1900174.
Pa Mi, Cuaderno, Que Mas Pues - Mashup Acústico En Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f0325d7fd311c96c8754815d8170d907e9d158ea7d149ab9e9f6de1ec89666. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM9WM1900171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5b8765a7003afb4c4c04f054a2062686bc9a1b9a52d923c46f85826316d3b7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM9WM1900172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502108b24640491dddff5714288fa9e938ac7e5140b39392b58b2c40614d4e52. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM9WM1900170.
Que Mas Pues, Miss Lonely, Solita - Mashup Acústico En Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2df752bd2e50e2c7ca5b79a8f9ae55bcb17c3dbb7b30983d065ec0706f46fd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM9WM1900175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e4e0f056d5287d696212ae55b54466939c85540f6c5499cd28f066c60f31ab. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM9WM1900169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030fac7f3c6542845666c5bbbb8e4cdb4494f720270bd1ca27dd6156db2cc12b. 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/QM9WM1900145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b94e5f89c794be2445693f5b17de376953971d2f21d3f51393bfb6212fc914. 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/QM9WM1900154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87bbb6bfa2a14f82508058b8e379cdafa04c70086ec27579a4dd0932bf07a3b. 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/QM9WM1900155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4a11dcc3d3ec2e2de3743cf5fcf8705d498723eae95979e56d3f8795b77992. 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/QM9WM1900156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2ab2595633071e00ff73729351213e8feeb5f102efa38f9ecf97e9fe692e30. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM9WM1900157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ddd399b25fd03e8bb5402fa49d90b6a259f6589bdf6ac6e1d2caeecbe1281c. 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/QM9WM1900158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf867bb42317343f1cfb48e06c3064473d9e887506450027663bc37c58a563525. 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/QM9WM1900159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00389da89cb0b8842041c722a7f5b331fe54411cbed38f6e7b284460122e7d7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM9WM2300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3b3a80c5e4e3e062a4e7b7810d441529f775dbb93dc40e0a95c1397a5811f0. 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/QM9WM2300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a55cf6fbc659df64ca37ba8beda86832f89fa1dbc4b2dc624c43b0cc42b2a9f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM9WM2300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1322eb7c3847044f3f68226f20239bcaea3d217ecfe811929b3f537325149a7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM9WM2300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a82d3ac11866a3ac9a819f92a7db2c34a1571b2d3acff1df753a71beb02b9c5. 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/QM9WM2300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dea5fe4100df4587d52c7491fa2640c64979fe24c99abdd6d09d0d311a84e5. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QM9WM2300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4182e1e0b85aca1bcbfb28c7e5bf663cdc097d3da7479d49ddaa2fdbb1866f75. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM9WM2300107.
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 0xefc2cc58ee003adad8589d69ac3df86e5a00231665ac5e929df64a2f4693e0fc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM9WM2000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390f5bdd4a690c13fb85c8a66caa7764c28102a185ae4398fcd9df4a576215b9. 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/QM9WM2000006.