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 0x15c48a6088b105bdb502517af04eac10c0e209bbeb39f3f40b0d5da9cbcff1af. 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/9508f15d-ed5b-41d9-b685-a9d94ff14fe6.json and https://artists.proofprofile.net/proofs/artist/9508f15d-ed5b-41d9-b685-a9d94ff14fe6.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 0x84b384793c50d3f8cd45646e8dbafe369a2519a33f315dfb31bb95711185c154. 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/ES75E2503929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f7d78c71a95c493cb903f8a07e4928ab942c0590755a0ca0cc3a94985521b6. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/ES75E2503933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775b0a661a5e0c3f7d904581f05724cf2e62080116ab518882a06f7e4c4ef1ec. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES75E2503935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd358b33fca4eb5c6e97ce96d3176e7985f3330dd3e880f63fd892600cb3d461f. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/CACWV2595040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fe057c4ff3cdaea00a4b21f48b042101b8e9a3fe09414f8b10dc97edbce479. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:41:59Z), 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/ES75E2505005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a9c018f24156f2449497ed1a6ca080f9dc54643dbed01eef7f3ab6f894eac6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ES75E2505006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad49c7614a15267863ecc4cc8d68ed079f2f9dbc407f9b91ae6026ad5b7730b0. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ES75E2505007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01310355455a46598bacc64fa2855f5a3a1a81de63330b3f65a69854b250e7f. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/ES75E2505008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290cf886965988f7804a3f489f4dfbc9408367c1dfbfb2b91fc6e889be2993c8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES75E2505010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c97f6ac36fb604f84443da97adf124a9e4e9f1edaef0374dc8d9fc0c3c3dfe. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ES75E2505011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd875d0b3eb2c5f06c955141b12ba3e4463de9a2a03ca6fcecba3de06776d033. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ES75E2505012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cfd9233cadc0656e8afe79f6df4262be1fee9959d36bbb79357c1ec0f9dc77. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES75E2505013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e92c359c2c2786bddb75bb86911513924b7c4db48ed8dbdf111cdbb5c5598eb. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ES75E2505014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7d60dd285d38b7bc7a8fdbae4f5fed50193147e71042b43c0cee4fd60b6a70. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTLA2572408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed26f42a078798ec120cd7714248a2a9550025070d5957d6ca724fbca883e62. 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/QZTLA2576606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7023e33f1b514a78d764354d4de4bf8ba3e84974dbbfcf926b01a8487628ef81. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTLA2539666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95d384eba9b8e896f5e23b5f98646294d5b128bbdb04cf9d1760373db738f8d. 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/QZTLA2533139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf191007ed4ae6495b474e21553cfbef29531f033fdb9b5546ad68dcf19ec38d1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTLA2587980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b1737fa033a3af5a44dff0d9b180825d33e5ad095e2e2ed39cdcdeb3e2d252. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZS7J2575732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab621129fb01274249712fb434ff19ddd62401122331d24dfca7db3d29a81f3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZS7J2521859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1497f4e2473816a8ae36546c5dfb2c39bc57dbda0769bdc9c569fe81e2f29e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZQAY2545851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a98bd0669fd0d1aa4cb588c16a8beaf6097da71a851a94d73adbcfa09480af5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZQAY2531150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2471b743ea1eabb174d98b73b8b4d450ba19ba19f7059b0a293072d9454b1d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZQAY2594067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7415007b50f95ca6f8f05eafc1131886f3513e7c02e4e850f50cb906f588563a. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZQAY2566623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4c58f5ae3a6502a502388fbdff6901be6ba0c4d574c80e39f31784c56aecfd. 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/QZQAY2594693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a62a2d70d9eb90d987afcef956752257ba89ed77c05a1cd3daf51d46dd09e2a. 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/QZQAY2541729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83e0c2111b99bd399ade54c93ca322a359cc9428a4bee02baa6301f1d8a083c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHNC2326490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cb807952e7bce33aa2cdfae65d4c0a90a32c47b92ae6861873b2ea2633bb9f. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:39:21Z), 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/QZHNC2326491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb54d539dff165c1d3180770f744136ca1ef6b0c80fe7236a1182da193881c7b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:36:27Z), 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/QZHNC2326487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19666e3eebd905d1855f4106919df787861df0365c6502c7c84601127ea46391. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CACWV2595044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9516cc644ca4494f39172644b76776ee794861fe69710a91ca961d8a2dac53. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:23:12Z), 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/CACWV2595039.