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 0x59c051b256194bd365b4f6c9f68f30a9a6185373fe2f85937e17c28d061a7202. 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/8c79d7c8-f994-4f0d-bbc1-6eee4da5b373.json and https://artists.proofprofile.net/proofs/artist/8c79d7c8-f994-4f0d-bbc1-6eee4da5b373.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 0xa71fc7e553e1173e4a4daac03bd21a0980e1f20484c1afee684a49bd2d15fd8c. 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/UK43Q2592743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600fb5cd7aa0955ff422476ebb1ec0e4badb2f726b658ae93c8f5b544ae0a1d1. 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/UK43Q2526412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e48dfc1ef98bac496403aee664417cd6f2512b7d3d39de849ab7fc5b37a438. 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/UK43Q2564796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefec8db316c2081959cb27e26652362ceae2f7bb203386835f0d230a03ffc803. 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/UK43Q2591741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd054cae0eccde7d6ff1d1ae793d4b497f340149e8506e5ffdc013b3364f3289b. 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/ZA56E2421886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cfe002ae0bf6747896e9dcdfd3a9a184bfce588b148f4ea8e3d87043e49a71. 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/US7VG2514708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf222167c546bc9331d376f4cff574af421b2bc8f6a740fd083f2f06e655db011. 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/QZW9M2473105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095e663fb66e3f4b3654125a20ff3b8d14a9b95225af7e5d459c4c99ea231abc. 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/QZW9L2477343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28fd71beeffe8f76840802bba43a94c75e5a96bae4dc892e32c69e42eda6aa6. 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/QZW9L2404211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e16f6b88725e3f858f8cd088f885a4fb8541e4db72037a620fcef5c73ca602. 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/QZW9K2488598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4053b4d82b881ee30ee9a27afcfdfa41859c33fdaabb1d81e9ff621458c1fc6. 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/UK43Q2456300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe6d65ad4b6c0a2ee8a9d06d11096949c225023c3b21007a70ea91c44fe6e93. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/UK43Q2451928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9639f7b856e90c4a58920c7d5d313594fae363315887cbcc737f15d24c5568e3. 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/UK43Q2419004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea5b4e64cff3bf163ead417619262f133d19ca1cf8e2068abb2feb32fba3dc9. 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/UK43Q2423734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8382c4f7c6481dc99ca7f58c53f8bdfbc064c80d8703439ce79e52ac1d3302ff. 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/UK43Q2438787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbbb49497a64e9c2d2887a003e906b0bd4470caff9c805d7b09b0ddae8a02e5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UK43Q2479144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d701a9e56441afa4b80d63388b5c84c23f2ad03394aa0595b9932e13676000. 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/TCAIF2417667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b03e6444f168c8afc21df96a3d473846205f86e300747f784c934e42ceec7e. 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/UK43Q2467035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8674ae83b607cd25af5374874819283d1c898c50c509ef023ec849076a648f44. 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/QZTRX2442730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddd9753f0902c3bbd6fe2d205f97e3c49d0de4791f3f1d6260b8f512a8022f0. 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/UK43Q2489984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ce61963a590574f30af552727aea9820ad4501be89d21d9e15a05be6bd33c9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/UK43Q2497983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3b1fa3606a2d5b972c0cb0dc95530a89a65f8bf0bc164e7b0453726fcfce15. 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/UK43Q2438977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8781366c7a7d2110845837c1c6db6d85d7911bffd5f213ac66cc7218945e49. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UK43Q2415016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c10650a541ddfb1a65ae4dbc9b96a2e4f2e1fc9a2db17d32534771b9823755d. 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/UK43Q2490848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77cf374fa284dd18a436756a48268dd54cfc20bba802ceaf7906a70c640f0a3. 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/UK43Q2469977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1df87da652c5e882e065fea7e350c78519d842f14223bf3a909eafe001e7f3e. 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/QZZEC2322197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0418416cd72040842bf048aade1b9e3a320766fbe0e64453176d89d1aae0e917. 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/QZZEB2340747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e2caead939262d087fa86998e769fda4f06fa62c84d05c079c07f12b912d2f. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZS7J2347702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5403d60c016be3eb5e0efcbb19453414099c25298139794cdc5b4d81bbd9385e. 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/QZS7J2371268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d5b6163411441949753fed0577d3055524305647450e13afb19395456b1d10. 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/QZS7J2377823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05421f05286ebc5908d39ed3aeaf465b4d424f224ba2449e912dcc722d867bf1. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZNWS2384916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2588b26ab28a8180dfb85eea6a7ed69c18ed37434599a6fe0e65921d54ff78a7. 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/QZMEQ2317958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4745ffbfd91513933bc9256c95d63f4c72be4649f553696451c98ac8aae5da. 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/QZNWV2342592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275daee5f075e029c1e7e197eab30aec238b5e4e0fcb436276f9bd00ae5deec1. 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/QZMEN2397306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29ed0301ffcc967e1dcdf5ac152f7b5d3b562495ff113f68a48e77c25b4d232. 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/QZMEM2370418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d435086c4ceb8583676e0c0d400800038169b4d59342e84f36f8f2a84b0c36. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZK6J2372003.