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 0x846206a7b2c67d07bad05f6ff7fd5faf86b7ce0ee3351ac343d3ec03adf62b59. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14f52ba9-d89a-4f4a-8d1e-41b7f111f076.json and https://artists.proofprofile.net/proofs/artist/14f52ba9-d89a-4f4a-8d1e-41b7f111f076.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 0x6e5b07ffeab888a8655738814edd253d36a4ebebaeb079d91761965fc03bd633. 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/TWS051230307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d29b90b83a8731cf73327222e9b8e85165a795501e2b6663a17811a7dae71e8. 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/TWS050901501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5d47f7938513cb7141e9b820eba094de22bf86756889e77dc03220277790a2. 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/TWS050903101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa418afbbd2c1e5a5f01495f6a897e8d7b6efcc42aeb5368e42340146abea9744. 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/TWDK50904001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cd9a4e6fe2c720a6593f446f4f52a74f6079c0e6d3add6e47e8c58b0431d01. 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/TWDK50904027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129e7e90b3ac97c6a5d2052c095b0d88baec3be769a43adef2db7653ca5ea55a. 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/TWS050903203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfe59d19a92cc72cc3e891c3fdbdf82e3d354e7dba79912891b8668d6ff27cd. 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/TWS051290101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36895f62be861715678de6ba47f16527e7094781dd035eeac827ca00494283e7. 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/TWS050903204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1d5a0252d327547d057330730be174b860f676ac2962b60617364143b79b45. 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/TWDK50904029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e255593ee396a9962f54853ffc93d08334eba33073059105680ff14d304daa. 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/TWDK57804009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727d1495cc1399a7373a3e6118db0288f5ed763b7fac1b237cadea5517d3f684. 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/TWS050902401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7efe4baf66e8982ac078363724e6afd985553526d8408b4624712d35d58d9bd. 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/TWS050901806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315b6d7ee6f5daee7c5d2efca5d3d7aeafebb2002e3f01c5d046b7a671801d87. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/TWS050903102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82355137875952b010f4d264c8f1991cd8597e2aab8db053a2337359ae383c0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TWDK50904034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51a2b0bf99c109c9ae277d4f6baa8da4d6d46e855e9094af224b5f48589f1a0. 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/TWS050901601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877826a7b0b31a7fab601d81d45eb2f5ba17ed91a233d5f0f9a31eab179b57c0. 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/TWS050903610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef6c118e9725f92a4a01afac9de600dcc2e40079269c383e7afa91a6098a893. 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/TWS050902103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f92eabf6205ea34618b035d2983a34c393cf970686364b35b5ea820c828924. 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/TWS051230906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc930d2132996303aed48bdf2d0560d3e10114a8b9c2cc8e198c6a86b4828bfad. 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/TWS050902402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5d47f7938513cb7141e9b820eba094de22bf86756889e77dc03220277790a2. 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/TWS050903101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ecd17f16cc39c2f71a9c93cc38ec606abb57eba3d7db248106f9d2c5ce4984. 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/TWDK50904024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cd9a4e6fe2c720a6593f446f4f52a74f6079c0e6d3add6e47e8c58b0431d01. 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/TWDK50904027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d7a512d25869669e8d5dd1330571515317c8a33638d5aef6e42a2ecc8f1159. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWDK59104065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f803a07da8a301e321a471b07d0a6a3789e5fb7320c4e84fb1155d98d39993. 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/TWDK50904036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcd9cc12f449ee517502f4e96b15a1cae86a43beb7a2d6d0220fbdee4ba89be. 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/TWS050902201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e15f06f2ec8df2101ac290bd6d3bcf83ad3938ebfe3f394856a8d4d9f2d7441. 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/TWDK58204011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce88198fcb408c455d045eb95b70d9b0242b65ac1ca1d90238ef216ada91eb90. 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/TWS050901304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4e8eed476cc89162a5b1a53c0c2e5ab05c1ef1f9a61d70e4c07e6c842abc26. 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/TWDK58204015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff052bf908151334730b0462ecb746f7deed1b9793d786adbd6c1a4c5fe7bcd. 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/TWDK50204028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd618425802b0fa37501a6f0df9ea88889a896ee4eadfb5b6bdbc4071463aa2f9. 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/TWDK58204006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f375e14a0e8d457fee5087c041e00b9b46f47c2b6b78db5186150b4eb024cf. 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/TWDK58004003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcd9cc12f449ee517502f4e96b15a1cae86a43beb7a2d6d0220fbdee4ba89be. 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/TWS050902201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59aaa31b14e100e9d34fda0d0c318aec0553788f47f262a37098222f5d706984. 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/TWS050902203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcd9cc12f449ee517502f4e96b15a1cae86a43beb7a2d6d0220fbdee4ba89be. 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/TWS050902201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bd9ed4e94a66d05ed79b80e1d51379b12da43743e0cf175af949b09c5919bb. 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/TWS050902207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a005d9dcdde178543994ef5d3ee31acbd0eb221f952ffe15e4d5d0338271315. 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/TWDK57904005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57869fa183d2618c12f43e971e7ab33396e4f84fcd03fcc2697be72e09524584. 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/TWS050902202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122263df7e643402a637f65435cde80a0816ef4e0fe37f117dc0034056a04fdc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWDK57904003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6cd4626208ddcb30e9fbbc6516a9505e1cf7d3cffd6929aa3c150cd2d381f4. 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/TWDK57904004.