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 0x8f79063a8b77c239703bd0d1511fbf9059b967eb2b2fbef5091f2744a3929256. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/847d0219-6684-492a-a11b-5f238478a88d.json and https://artists.proofprofile.net/proofs/artist/847d0219-6684-492a-a11b-5f238478a88d.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 0xe8634a346844b780d3bca95255705f254c30720d14d02764de27e5a8f277e3f1. 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/TWLJ12401001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10019774f47e967ff182856f476b7e8e4b32a81601489cde87f6f1c5a8b35bfd. 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/TWI431500602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d6bc731328a501fc113322097c825a00e04806e5a229fbbc26f4cb205f98c9. 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/TWI431500603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fa8cc9c1bc1d929b6e4b8a8012e9437364e78d4d004fe339d9f1f2336e6ffe. 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/TWI431600604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942ddeb20aa38ac854f4a13d760ee1651c16f62f93cd480cb7aaa103044643bd. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TWI431500605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3a5db6b509858a249b4e81ab3c7abb37a27482d0a3ca73fc4143e70a59ba9e. 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/TWI431500606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736c28f0be4c3056f6301a22ae6f70df09abd20162eeadedf442fea1ba890783. 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/TWI431500607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297a66d41d33dec1676c127af43728ef73777e6eba85e8c93187a6b87138c728. 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/TWI431500609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23861d2a3938355f4076351d7d7aa5003c6107e186e814aaf819e5d216d742c. 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/TWI431500611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb353f50939f695132be94485a474e4bb19a2bee0db78cce82b04355acfbe0e2c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TWI431500601.
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 0x188654609c4c26ae66a12ca971ea9d328e2b74fce733616d452e9592d852f42a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TWI431500608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66b26c0fe5e6cabf2667cb1d50a9e239c2f2a3f3f74082ffe9eb5d77c0cf0bf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TWI431500610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed438d8bebeaea295e703ef4f4adad9d5cc185fe371b98bccab97f4af09da9b. 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/TWV771307102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805377cc5308b50021dc06b6a0b426d6a0ac2fb58ed9502b846948866793eea1. 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/TWV771307103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc18b8959e92b74e5e4c2c073c20ea95c46d7491acbf573adf08b79a9f65f48. 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/TWV771307107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b7f15d8b37d3d635d841fa947ee9e3ee406cbdb2e799c7cdb42b3a285c72ef. 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/TWV771307110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bce35ddc51d0b596e0dd44d7e74daa6ab0a7768aea672d8ee1a041524e38059. 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/TWV771307101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4b8186859f0a065de459d557cbb35e026d444518e716cb90a567f3f876ff78. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TWV771307104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1cb30cc1a4d647a9b64fce9020607f51de0e1996d649f92cfec42e2aefea5c. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/TWV771307105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adc89371a32f601b4a468332a83d8e524d686223b89bdfdcebc00efec0c810b. 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/TWV771307106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a9fff8f3f15d605e6c67b3a8a7f12ff745902fc813197dfdeb2ad3c935af92. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TWV771307108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff06eeaf015c411f32c0d9e1b413d3c8a12ea3cf444879394ecb31de9a41fa5. 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/TWV771307109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f453e3335ac04f9c2d272456ac6e6fb243effc6dc5c8997830e1f774a7cde4. 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/FR10S1618542.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1788016ec8728a2dd79f149250053f8bc1e1c125bd4072c6da6a217ba170de. 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/TWC612314901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97754c62e2824fe14f3a4b851b508ba856cb799cabc44dcb9dc1ad394f073132. 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/TWC612314908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7345ae55959ee4244ff73f6cb2258e1a934bfd6842814ed40c78064c6e58109a. 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/TWT930900009.