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 0xc84cf6fa191a83074406ee81316a8b46640faff1bb01b846bc83f66d813cb006. 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/4c53c36d-6360-42bc-9bfb-929b1428b289.json and https://artists.proofprofile.net/proofs/artist/4c53c36d-6360-42bc-9bfb-929b1428b289.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 0xb7933bfec22685cfc06f13c923f98144798054aee91a009ef8217936a69692c9. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:09:23Z), 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/USCHR1374138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641b67508ea369ae08513d97f349afec1adcd40040b623bb4829a3f9b3827992. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USCHR1374141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c23c79a211f9cc3489494b5d93626ab0eb31c6ec541a226f2ef39fee670ee3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:12:24Z), 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/USCHR1374142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a7839c9388ac7b17d2dfb582e9825cfe81ec1a9c971526e3b9555497cfbdb1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM6N21446300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e4e9969ca8dbc6acb5130c13e8053612acdb3c4c120194290de10bec2448f9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:26:35Z), 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/QM6N21446230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e62d5e8640702a965fb539a20ce93350350e0b849fc32a30077efa6ff85ffc6. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QM6N21446202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad27671883a22c74953a0777dad7b4ccd9e6800edd1c256781d3dff68607c40. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM6N21446219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d178c4529ad47c7cb0c6cdadff07d2581244658ec03818ad3d86aab933bab08. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:14:45Z), 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/QM6N21446220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd103fb3feacbd6985920afbcdb5a3b986175e35578fc26734e81d4a3e7189a6. 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/QM6N21446221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bd3c233d4449d727d5226fb41a94fc3fec4dd26925bf54ac54850dbeb913d2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM6N21446223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7e14660fb3b7235e5f8215fd522b125545b687767273001a67fa45f9164321. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QM6N21446268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e197e5c0ff7d3bc97d55977d4277502ad899db714474b0d1471a1bff6168e13. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QM6N21446269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d80563a7de31f3505a674fd54b923d5274807016d4398195f9b134f80d7633. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:40:47Z), 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/QM6N21446270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02305b5c63f5cfd9ad0d09a194a314c8d93d4e867d505339a62f1294402de55. Chain 2 (Bitcoin): anchored in block 957681 (2026-07-12T09:09:02Z), 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/QM6N21446271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d25a51635371bfba09d7990c32af10f86043088312a1ddc6f1c41214835172. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM6N21446272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddb5b4d0886e95f304d4e10c184c98b9d46554ffdf39c9ba7f2190891889c1c. 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/QM6N21446273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2148abc0c1c381b18c7560c2bbfd82784207b356666896f661cf872f0220e6ba. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:03:45Z), 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/QMFMG1506054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ec91fef51864df2da13d575b4baeece33a63f1bc4278c03b38380874e38003. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNC62212176.