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 0xd43488a686bce89ece9f90b652d797ab16d59fd93ccf5f2d4de9e61376524296. 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/a0458f64-d93f-4349-b0d9-51b5d43a49b4.json and https://artists.proofprofile.net/proofs/artist/a0458f64-d93f-4349-b0d9-51b5d43a49b4.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 0xb358699f7be2c7ba4083878d291d20018b860f7c018b6a8c07883685bc2be3dc. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHZ42113087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a438a8b04f07493b535903849907e05fa756069b17e798ce66c19752ec767f1. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:06:40Z), 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/QZHZ42112973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1db4106be870eeea2230ce0b53926fa3e296e83389ed5cb7475ecf80728f7f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHZ42138487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8d63fe87bc6c320ab5f89666bf8e17a001c5c502a645c6079ed8e2297cd81d. 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/PTVI12000484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d50a7a6fb24d7a39c5f687a5179d2d7985378ded051c81e991ab91e3dfe70a8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHZ42138240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8d63fe87bc6c320ab5f89666bf8e17a001c5c502a645c6079ed8e2297cd81d. 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/PTVI12000484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805492048af41e546e39b2ad07055560bec098b332e68fdfabdc91e32f3f45c4. 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/PTVI12000496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f9973d5d52032bc3d7d6969637dc7a4d4faf0d4ac4769f6e047f054a405240. 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/PTVI12000498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9929f28a12a9acd6e4009ed24bb86f84429c362c47b2055092819e9349aebd2. 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/PTVI12000501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4414b5d699ac217cd3330a093220645ea9bdc6cb259390ef2ac40f2c5c64070. 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/PTVI12000500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47b3f7cd6e60ba713fbcdc495cb2654f91a3f86c8bdba6b453d5a63286cc087. 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/PTVI12000505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957b6483b34f319b73424c35e75f0a0f995f9e1accd690c76d5195742cf71214. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:05:57Z), 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/PTVI12000508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2297fe704868ac208267b11727f46475be338441db164e43af4198df173d5b6. 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/QZGLS2189241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe391cadb8f1827410876bec7482e6e0b9aae36301a3f0987c84f0805a1c7794d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:21:39Z), 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/QZGLM2197739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021ee6d92c581d8704aa317af4cec2b0e72baf3b4475f5337abdbd9de0ffb11b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNJV2165059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640d1f5554b7e160c699be0ff71cba19617eb6b753db3efa6c7e8cb870c8b1f3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAGR2236896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834d82cff10ab4a369bc0c680c323665c547749a4b977af9f0cbb1066d11bab8. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/TCAGR2236921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5900b2970448beddb3ad22265df0d4a10a40c1faba8561c2268496428ac6d364. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:27:35Z), 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/TCAGR2236923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8cc5f7452aab316d0801949829304350b5f4ae8fbb4d218920a59af53d7498. 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/TCAGR2236927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f68bbf20f0828a364bf28fce6fc87e86e2b3b2e62c51480167191a4a8c80c01. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCAHM2378501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc1fdf9543e2770a05dacb9547ac02b86420609c158b7b09b48c476509b5682. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAHR2341338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a0c550d32ec2edac73e051d59402e8998dbff6536f08b33d91d598e1dc6597. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PTVI12400304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14cb33817c23d68a18331ef28b54580d5c8504bc2fc396761f05aea34169388. 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/PTVI12400305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa0be463f87985eff6fc1d0fd4e06f037e32116cbcf8f5be81da8a8e7271179. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PTVI12400306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96aa5750317073f413f0467a8e0b5d45279121e4b59ed67d4be4c116b0f272db. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:10:38Z), 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/PTVI12400310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132291a03710a524be16536531ba5a185c3b67c379739342483a011d9e3b9414. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PTVI12400313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6b39429420826bf2a40646985832d234c3f988aab9929286161b621dfcaee5. 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/PTVI12400315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe422ce9286885fa8bfa88dcd44c26c7c9aebd2f15414cba67f8f49e69d803da4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAJS2535405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e6f537a7c5460ec8621b4ca1cc1e8de19c3034a5c18bb6f33618c364311408. 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/QZTPX2588527.