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 0x2049fb75544ea746f74ced746d52b88701cf45107a25e24401a695a491ce18c4. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c8933d8-e83c-4be7-ba29-65236bc4563b.json and https://artists.proofprofile.net/proofs/artist/3c8933d8-e83c-4be7-ba29-65236bc4563b.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 0x8aa1dda163cdb03c900db8c97b3f3455744b0098c359e19b7e82fe727bdb0c99. 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/ES79A2321004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a62d58d71252bc8aae762a0aec09b11b3575ec885628dc70752423afa25370. 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/ES79A2321008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c2a42ba71c8b8d974c23f56245fc81931a26b30f7e975783e920ccf8990bb6. 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/ES79A2321003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2c20527704989cca633e6c835a692131a08832b565712e301a9052bb10a08d. 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/ES79A2321009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabfd2ac0347313e31e27a0cd3948255c6178b76aa6df2ac0d77fad62a2a2db6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ES79A2321001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c13d220730c3dfd08ec07e3b9452e4294a676de473be5b3087bd317f060ac2d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ES79A2321002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561c9807bd4167c286b4657af5a633ef351270b57ddb5768ae15ae6b0413d85b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ES79A2321005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9399031e9e2804aeb31304cf93f067de953ffd5ab5e780228d5b13928b6eb5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ES79A2321006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409b6c744e0ac9a26efb26ad9a5c2a400d902a8c18a3b73d993e930d22aab724. 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/ES79A2321007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bb569942f941cec5710ff7fa29d3e3da1158b0532feaf36c4f305d3b9362e7. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/ES79A2321010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8987e350ec5a4e613c84caba561146624302bc0ee23eb0ce1260858f6230fc3e. 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/ES79A2016602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51e40a90f2f6827a415b8d794382bcffb7d96ca1ff29932095e227e80899a83. 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/ES79A2016604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a577130ccadec33953ebb1517d09cc1f032971bf209abe84bc868d3eba6e751. 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/ES79A2016605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2a77c71d7ee6f6890fbe440c0471be0554ff1afaba8aad4266b66c8eba64a1. 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/ES79A2016608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee47ce682c8c6a99c16020e74664c21bc860ac9ada4d49c01c53ac848c22252a. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/ES79A2016601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0949066763b741c00e33b9bd36b302feddf2323a24335ffcae431d182462d111. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES79A2016603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21305b2d2bfefcf3853f66da997509bc6bc44127b976092086abf072b81095f9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES79A2016606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace16081a5a6696ad69ac2c154047af742b26823637cb1583975f50ed4ef5f01. 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/ES79A2016607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a759dbd6fdd16808e9f60c2213910fb8467fde8e7cd5954f94c03df34a2b93. 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/QZFZ42061964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9950f6efb2a2a13549930903e928ce78fe041fb2c6c122ae0a353500dcb363. 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/QZFZ42061966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce07c2678c5156b669dac2dbd16db81bf35ccd8ccd529fda5d4f550e759a504a. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:01:28Z), 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/QZFZ42061965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2baf784c68caa778c31c66b50d4000980cf1196d32aa8e0a526ac8580dd61903. 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/QZFZ42061963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc050818d82974c7d9b055df0fa0a0c79273e0786a62ae235968af7a2dbe9711. 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/ES6102000250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a164a8d82259c418a31a87b15c44ba2375874690f924bde0dbcf7859553b23. 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/GBLFP2045238.