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 0x4914349ad1510c95dd1dc63cfc88a9af4b0b25d8207fc87804a8c66de6123858. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af32db21-74fa-4892-89e9-923a8d94ca2a.json and https://artists.proofprofile.net/proofs/artist/af32db21-74fa-4892-89e9-923a8d94ca2a.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 0xd4625d2de543095eb9e9ef608b823c2a0e06f71ecfd406d5924fca840ba71273. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZFZ22280584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbef30ac6e4528e02102aa2c5bea7bf1ae40f8113811df8b250395b8130bbc10. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6J2004410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c0451ed6c35ac1d543cf82f98925a988c40dd7a6a9bf7e37e70e28c0758de3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWT2032483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4806f2e1439e6900e2bba4b406fbe915b7bc8d0139a636d958cb20b2bc8e943. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWT2032484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8505a4af80a328cbd8c454d70cbaaebac58a009d64aaa4379a3150304aaf96. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZNWT2032488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced5f4e11e019fe1ed39dcbb792c1790d2b78fc3c9b7b670df7ca8e3660ef42b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWT2032492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20de8f0a29523435975d4606e9e4dd5df5a83b711781fec1b6742b6129a7ce7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWT2032495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78dae7c1100d40a7264231019a3b353171622df916b5158cf5affe91622e05d. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZNWU2160656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c4c56ad62982870d8be9b762e001d7df83af59e525cacc6fd914d873ac2d34. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:36Z), 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/QZES72399460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c67d16188fa709c64ec47600463859f4e07aa06f97f31ea407bb6a0ec6f1ea7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMFMG2319190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93a11e7ab7f403ab221dd2ac37ce6325585d82841a9ec7ef996fb2644289564. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM4TW2424687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2556ee1fd84ebdffcd443256c48240560e3b8e065dde06e396b7fecce87eab. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMDA72409733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231f58699a7db81fe939dfd2244bc95f9139b8dac1c160cefa096d5c9a1998d5. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:16:07Z), 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/QMDA72409690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b23414583603fe5e3366832434a48d8898f6bda7077386ce9c69ec04b374c2. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:38:15Z), 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/QMDA72409731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2556ee1fd84ebdffcd443256c48240560e3b8e065dde06e396b7fecce87eab. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QMDA72409733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187c02ce5c92cf652504847e1bc6e6debe0058a9d400819da038493c8b7a498d. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QMBZ92474904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d001363ff1f7df40201855a753a1beec0dd9b737e6ba2df1f77996b5ec36c94. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QMDA72409769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499648bee667a2b898c1af22190d448bb52719824702108efbab12a0ae007e7f. 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/ZA6FR2200010.