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 0x6ac767cf0c9e56c20a7a9bfc4bbfdc24ce9db02b417b2ce75adb4cdd9986108d. 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/fc79fb6b-86eb-4494-ba29-0eb2bc238bd0.json and https://artists.proofprofile.net/proofs/artist/fc79fb6b-86eb-4494-ba29-0eb2bc238bd0.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 0x50e8505e6e916a23b8655577107f376e369ce8c3d60c7092fe22d937fe6f640b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:40:35Z), 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/QZHZ32240131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2824664ac1a7d76fff7854ae57d567b90d567ce4bc5d8ea2cb47e1eba3741785. 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/AEA2W2201021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7b6c1b441825c1ce471315f9bef32421b5120d5807c9b8d36291eb98d419b5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA0L2393296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1372a0479f1efa8d92740fa40374f95d9bc76b259dd1df86d5b8de660d120c. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:07:18Z), 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/RUA1D2408647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2152ae3378e019f7913f7ddc8bc72a1ea8c8d5c20df9e8a16ec708a10009cc8a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/RUA1D2408651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb53a381a8ab3d81732ba26456e3315f25a562ffbfc1ea239b577312f02dff9. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:30:34Z), 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/AEA2Z2503261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0dd76c173a8769a5b24f750c455af57c1a9557504b3666b354c04670c217ff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AEA2Z2503264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8662af2cbaade76d9d5126709e887149fc10ec64cabb331aa6d15da5b3cc13. 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/AEA2Z2503266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c55ed7d02825f508bf6391f15863a8cdc52c21aa9fbe53f9ac679c52656f1e9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AEA2Z2503268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a1faf8784846a9d26f4b59e1db45d54d75a6f229bdebe3d89df26702faaa3f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:54:23Z), 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/AEA2Z2512390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9edc85dc860ddc28ec2f91175a3329745d2ad6ae8cd55aa84f0c8137d7cbd1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/AEA2Z2518904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf798177f13df74f5a09632eef6f44882f6ef5a691c84ac64970d98a67feb3bbb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUAGW2505698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf7f2a5ca75bcb45c3af1be5040dd8ab2a95411edda9f7e1ff546802e5ee1ff. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/RUAGW2506131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840e281df1f93a0a01ba817257257f6de19ed1928c2feddf3f447dfd6dfa8f4f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/RUAGW2508999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4456c78fca7d9a4876c2c6ca84fdc718ad3f3cf708f0c87ff607028c7d4ab0e5. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/RUAGW2509221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0051a35d241e61a2cb486b8c4ef1fd11c377e313935c0fa462e380b70c8d751. 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/RUAGT2359245.