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 0x8844a4bd065bb7308221c136a008eff637041d2118c14ab05492f6b89bdc347b. 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/f236a8f3-0aba-4e8b-bbad-12bfc1d46c2a.json and https://artists.proofprofile.net/proofs/artist/f236a8f3-0aba-4e8b-bbad-12bfc1d46c2a.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 0x55ef2e72437f065c9025f14852aa44adf5c1ac326fced89308f1bd15b03f7770. 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/QM24S1924538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdb303297d78e4906b80d3b225fe8f36f1b6cc88b62c710d7b27c42fe6de0d9. 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/QM24S1924539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078bef7e3fcfed010c2148221a0bd89cd9d9f7c9617dd109b398f036d64d654b. 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/QM24S1924541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d6bd4a1ef4f2234e802f0ab04435673a0d9c5207354fe207c18483252b0961. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM24S1924544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c9f0b38eb92f7e87f8a831db1955de2d74159caee4fc9c9536e18cdea700e4. 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/QM24S1924545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe871c69192bf4738db529b4b838bf5e4e011bda3e5ec7df636dbfda35e7ab235. 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/QM24S1924549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3834b94918938cfbc22be3a931298eb54910718b57d94537914dd894c8af7bd3. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QM24S1924540.
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 0x6744cf58f862d9fc684d2f1d601c86a5cc014ea47676b399e2ac2ea4df5cc223. 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/QM24S1924542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7a73af7a9a7a19beca45cf434bc0379465ff9d89efbe8778bc9abb38522d75. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM24S1924543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1ac178bd0f76549feb160641e5b0cedf76dd20a0bfee76c00a1c6adaf2acba. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QM24S1924546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae33ac69bbee4b16b6c32a558ecea5fd99fa8c7447f1b98dfa98180e51b1497. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM24S1924547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa332f0488a15faeefdc0c18a82f51e911fbf9d9a9acf4cfc97cc6ae1ff758fa9. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QM24S1924548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962ada8c22023aeb11d5f5e380b5766a0d8abf7988ec512446395931b7213e66. 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/QM24S1814734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659ff7c5a183db68ed55efe50077b564d7523912c5d04309708406838763cbb0. 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/QM24S1814736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4078b2b110360e36411fb542d12e8cb9d2e0e0eafd5cf4fe57fa945ab3fcddda. 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/QM24S1814737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa49610406d8a31b60ca1df8f0226accd3dc7387d83c502877b8a0b4d4e9cb6. 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/QM24S1814739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6115f3541e82a10493258f7edd51b5a15fd920cbcb72b567739fc49b7460046b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM24S1814741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eda7a165b36002f968aab5faea3ad17cf41cd622c6b7bb49c8d1bff14e1102e. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QM24S1814735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996a97c54c1b50ab8dafc55cf66ba10cf5b442a0c7dd6f24476eea54ba440a51. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QM24S1814738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0e752d5df27b8afd71d771923255b4ee81370009e18c57b0ac70ce84b59e98. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QM24S1814740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0662767836e4d8d12868fe807c75953455e3ce46c7f117489e250b7bcef41647. 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/QM24S2107225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1c3b05655b31da8ebd41d0ce05ca56426575a71d0b822d7a7cd8cd28f22140. 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/QZSYP2326897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf3d53b649d94225a1e6649c380dbd2d5203b901c99dc72bec0ad21d60e3d93. 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/QZNWZ2431581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7b94ff675632f52695a398a51e40518c5f6f415129e947607890ec97e3765c. 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/TCAID2403993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28938ba4d6fe1c153982a8f06361b332d56b93b167a093b2034e61d62cf095e2. 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/QZK6F2036050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9337991b6727475e263bd0e55dcaee278f159d05bf8db87ce0fe4909d19859. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:47:57Z), 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/QZHN92026032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1456dba7b33b1f00e2a16f981214b238c323df897c5e1c9f7bba4830df4c5f99. 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/QZK6Q1955964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb62e5fd8c60bd3c2cebb850055809dac803b2371a33f7a8b24e800441693843. 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/QZFZ41972576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5d0d64851ddb9de9340fdb392d14dd9cbf77dfc4cc26836313cdd13d1fc0f2. 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/QM24S1704744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e7703513fb352abaa3fbac03056649a7fdef27977a3f270f848642a4572065. 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/QZ9JZ1778520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602b6f52bc1e357c2ccc8cff9955f0c51244aba72442545d3713c96e95f8abdb. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/QZ9JZ1748812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd735a8d150155683432d8aebbec8e63bd4a6cd00b06b4b6f01188c3f79d08638. 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/QM42K1706288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a00c85840d64d4b9c40880106b13afb71f66c2db77d915bbcacdb8cf12b4a1e. 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/GB2LD0902295.