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 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 0xfe268ff2fb9073ef7bc3ab5c8f31dd12b5c3df41f02cd8f2105799ecae7a4665. 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/758ef0df-a23f-4c7e-9acd-a43aede52638.json and https://artists.proofprofile.net/proofs/artist/758ef0df-a23f-4c7e-9acd-a43aede52638.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 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 0x5268a566a3284745acba7556603915ee808330289ed0cf4a0eeacf7a0084c990. 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/QZTBB2234257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b437ccef38affdc42291543dd6560398922081c1dc267adc0cabf1381e4bca. 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/QZTAT2141072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2a9605e8c8760a703d2178015d11e5556827487c24825dc0638e262f3a7b9b. 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/TCAFP2191205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1646f333f5c3db2635a3adc74df27bc0d3fc14f385048cbadae8baef7a32347c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCAFI2011284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54772f23a3a219cd282cdfb7c31974f01eab46ab2c77bc6861678b5986297d9c. 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/TCAFI2011302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82febf50ec20f35544ca514779acb7096f3eebb49fff31b8f671d120e67a0826. 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/FR9W12215746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6632a5c87df9f4f4b55c396f64b0b2c4ece8466586be95bc4390361255e831fb. 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/FR9W12215766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1f3360652ed217329b7da15645ae8423aaa5633e16b162f32b59f39d3b7aa0. 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/FR9W12215765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1189c28ce6397dee8f4e8d92def4ffc3079c08c03ba50a416a5bf60264d8e4a5. 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/FR9W12215740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae33d77376fa91d9b8fd380e9cf7736abbf809ef01bf84ebbc98c463d5eb988. 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/FR9W12215741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bd4a6236e0722cdcf4f8f02b0fbb78f9c0e8713fe2e73fdd7a7b787bda49b6. 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/FR9W12215742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a5741fc419174dd2bf528fb8056b5fd5fb58a050b121250300e64a20ee9ed4. 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/FR9W12216095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadc7e9373175c9910dc6b78ed45b362a1e44dcd978b1c47184cf10f52dd3fff. 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/FR8FB2222310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11ca194f6f26896c30a6712f5a5cc65649175795ae3c67c87d8c02c785f3bdb. 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/FR8FB2222360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc247dd268d67509384d7dabcf4362c3ac76415a4aca7cfaf40c4815875d8d02. 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/FRX852408650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced04ac3953fb9e511b1c57d92469b33808e4f869882ac35b4e508d78c115a24. 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/FRX852408680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c1968369f05f2ea89f47362d62e6df9a301708be87dce8adab78f13718d6cb. 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/FRX852408690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8328af812af6dc23a99f3dc83b4e2a9dff6302af50bd4af9d67064c26aab59. 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/FRX852408720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d5d7eac07b3916e9e40e04cf06b35bf04aae653b59f2c15bd87427e75504ef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12417473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b40a885d9aeea46773da342bb0c6bc5b3ccbce7514fe5934cd9ef054e016dfd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12417474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86088442fa4558350c22727698edd143a485a5ff964ec035e1b41ae526b241d8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12417475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b01fa75abda5f2be01b8ea54ff38b7d9c15b669f4b5a7b054ded908306bf29. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12417476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f241ecaf32ca63cfd57532008dd8215a60d17ed7e72060215a0aaabc7722408. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12417477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb94ebaf9fc18938e18ccd1834403facf8490ebc761dc02d9f3b675b131f1f7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12417479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe8ef5f8f736291352363f74749ce904e41908b4748b4116b48315a7e723544. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12417480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d2d460a66cd1c0c8e91c70f2980c37e38e66b45ab5d10edfae1ef07e6fd0f8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W12143465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85534fd96e1e7d6081d9a3f04525b69858dfc0f14fbe401400bf63c7d35fcdc8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W12143466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0dd5e84765e77698e172cab035f1a616b5eb33baf6f8e677462a25db344414. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W12143467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f76dbb73f93d9624ad64d6844d555c59adb9612fb707a5b6346d23602a56665. 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/CH6542437288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979a85b4312540a6a72d4311b5192499d86ec326e9ccfef88b6c698229a3be16. 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/CH6542437292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2322637f9578826a22256506ccaeabac1ae90e0ccd5655faf015235bc0db024f. 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/CH6542437297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645cd318b7238f3a20ab92ebd93952158737a146543d2be83ad704a0859aca7d. 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/CH6542437304.