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 0x4ff2bfa7232093a62621fe2ae657dea89a98284682b8c597137625f2bcedf876. 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/dff0b050-4c1b-443e-9876-d2a2d11a6ca5.json and https://artists.proofprofile.net/proofs/artist/dff0b050-4c1b-443e-9876-d2a2d11a6ca5.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 0xf1ce5a8e9966e51c6a70e7812aef3198764fbac747309da408ce5d2000866edf. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/NL4NL2183038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa29d2a25a0cb7223338b811323fc705064a1c5493fd4f240198d330e3d81fe. 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/NL4NL2183039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0dd5e84765e77698e172cab035f1a616b5eb33baf6f8e677462a25db344414. 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/FR9W12143467.
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 0x86e88d0429a51fcc00e47f8ce09862ec58a8b7b80c416e61dbe02dea8ad46dda. 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/FR9W12217936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4381d71d05bfa27ea48f8f08c8edf604523c5fccd521b08068a4bef1852be25. 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/FR9W12217938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d7a78a74d70c1163602a42045273fdcccbb63982402342e8dfec93d2d8111f. 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/FR9W12217939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c71fbca902411c9a307d61c9c78419e1106def3335ddfbb72bf443fdb0bb8b. 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/FR9W12217940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f2e85cd4adc0844f06863d60eeeba533cf2153bfbd195e23e954487058a387. 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/FR9W12217942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d8e1c19a09709cfbd1cb0952cec38c09258430807394bfb5de728b63161783. 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/FR9W12217943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c47b0a51b3a4114d9880384b66a40a62223be3911c0325589ec7aa6e0648edc. 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/FR9W12217944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704c2a668571b08ccf10db9b1a2ec36446c02fa89c5ae6c863f511f009b4c307. 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/FR9W12219545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5445d706338e15478eaf1b7f8be2b41addb4afebae1ed0ab8cb94b4cc461152. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:41:22Z), 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/FR9W12217946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e07e5b0a0e79cb64f750437c769f77ef942c788812cf3b09392163e8ee07375. 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/FR9W12217945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86088442fa4558350c22727698edd143a485a5ff964ec035e1b41ae526b241d8. 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/FR9W12417475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dc107d78cc32dccd13f829edc4e8847520b8a4d28ac661ac7a63cbcc9b3147. 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/FR9W12324328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c69f1bf5df4676e0db6ff5a9911a410f7636b1f76e0e5af1e66ab0638388d2. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/FR9W12245643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde3784c493fffc2209e92b497ad01231799474ef01573fa079f924789f382bd. 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/TCAFG2040899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe722400d3b5eabfcfc954ee91f6c5ec63de22b9443ac96876beb212c7364564c. 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/TCAFG2040929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a51a78aac35fdba9a6dfa38e68d0e9b64198db1d3fef3348d0e9e00060431d. 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/TCAFG2040979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3361e56b3c26143dcbf107cb7fff802274faf17d5d6f7fdf5b5aab34a49520. 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/TCAFG2041034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae80056032167ff7bb6f97f8e9821c3f6ef66da2b7569fd74628d5bdfcd4c5f. 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/TCAFG2041064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae13229131feb60927a0a3e7f29ea054e9504d4c98f6a33285e85167adc9f44b. 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/TCAFG2041099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc96c90b38a0caf8c9d3984c385dccb8f54a36e1b7f998f62a054d48f34ac85. 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/AUGBT2338195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a3441b9d7afc11553b9b4ad15981605804601e9a30a211daec73ef54016a6b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:03:35Z), 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/AUGBT2342484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2627ef5c5da53e09a235712e7f9a161e57caafe67d9d37e39cb4751026e35d. 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/AUGBT2342498.