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 0xbc919871deedf26a62ac968fcfadf952f7970f7d856e4ead22853d779de505c6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da4e953b-8761-49b4-ab47-ceefa87df748.json and https://artists.proofprofile.net/proofs/artist/da4e953b-8761-49b4-ab47-ceefa87df748.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 0xf61d047406ca63c15b597eff125ac7f47f5f048890018d1aff4cce0b2c8bb4b1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN52465433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6781f3e579dda3dc5deced2c355f3fdb60e9fa868dc7d17280779d49ff11fe1b. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZHN52465429.
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 0x53352faf2332857f6d4905877bc3729b6e79113a20523752c1661baa90ecbde7. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZHN52465430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d263b114259d3ee34ccb162194736a1bf217c067c65e7d6217a3597717b324. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZHN52465432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf89eb0933c2ab4a5274d1b0ba61f937d2138727251b36d064e25f845ed5e096. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZHN52465435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6064554298a11bed1b186f37ba9705a08325d564fd2616f974900e00f8672b. 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/QZNWX2455886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df64d0b2cee9a26a170c75532a861304b0b139674b03d6ac1397dfd9d55cf32. 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/QZFZ62428822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbca2ec7f31e708504272b81ac015ed35dcd93c06e954c63c8971f3b67c3cdf5. 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/TCAHP2398167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1721eac38b642f049aa31afe101f1a7493cfaca1abb6fdb16fe2905924a884a. 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/TCAHJ2356770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacd79cc07f08e57117a48d32907b4b4411e303049363260e1f4e5b3d2a67ca2. 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/QZMEN2357014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bc3b8ed2435cb6d0762a8b63872fd33e595dc5af00af065a094b7be2a68856. 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/QZDA72326932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6644bd8a3f9f442bef4649d1cc38d72b6994b125aa103158456a758651f234ee. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA72326933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1dc4cd1ee16b7363b0ddaad05c54623a6c88451e5a576e07a3b10964d16aac. 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/QZDA72326934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b30110619f34f450d8e9c6638c438726f5fe639a27432d849d6ba818eb1573. 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/QZDA72326935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ea04041d6f606ae073fe3429ddc6963a4bf65d7eed8bc33adf9a3738df9897. 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/QZDA72326936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dca039bc5d5846c7a2f23cbcc868648d5052faac76970196aaee08e907f3a9a. 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/QZDA72326937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0915fe0fb05c686669881602282e1d3ec512790d1cf85c5326dd645553e86d. 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/QZMEN2295312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3b267b1ea769b5c9c887f975f9b0bc837b4c47ce70d812604c7aa9ac9b843c. 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/QZTAT2128118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb841255ea2b793a9c29bb4d250fe377dab7bcf76e100f5200d57cba042a0a49. 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/QZRP52154532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6681fc640cc3ee5582b44d54657d07e593837b44cdb9a7f9ed9128a3eb651e59. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZRP52187600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a39a3fc83e82adb04afbd4b69e655b1925c6911156a2279c75a55df7cc1fc1. 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/QZNWT2158552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb53f48a149ed37f418645da7bb4d8756347aa92792edd6a0316524aa20c7fdb. 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/QZNWT2146895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb448bd9337bdaef3a6e1372ccfac574d1afb2bfb68f3c546813ad99edbe2b970. 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/QZNWQ2180147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4df6fb5f391ebda2d1bea35abb07a09c0d20a0af6e96afcf03a2d6fa103227. 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/QZMEN2192751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ea32725d0317e105f8f49564186cdbd461da75680e3a85aa9004ff6e5be138. 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/QZMEN2192752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53d2491ca4208bacaaf371f91f899c583336ac58c318c062cc0bc3e4c62a554. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZMEN2122516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae942ffb366c19d1aa515bb1d1bd9ec2bc2ee3fa1ec87c23465265ce6d98b9b. 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/QZMEM2186190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11522cbcc8710537bea3b6358f4a017ea25f9b44e5f45f0dd2829550c9e1c923. 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/QZHNC2279182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e709186d9a009c5ab32689b56c85021ee9edddce71e2c1d21afacbfacb08754. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZMEN2192753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b05abd3e4e0f1b7ef9f8a20f908fde547b77e2ead03b066425825e2d96b724c. 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/TCAFP2194221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be16eb3dccc5fe24e0af928bc1732ac91fd0920251afe392c7931fb219238aa. 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/QZHN42171078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b70c868e8a4fa5f04dd7120189125e9761be7f34f2805090362610dd84fec2. 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/GBMA22123097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2375e9e51725b1675e05bd27f53b8b9e68e3c342dc70463ee53039303f212469. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6N2080403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb140ed6633b0bc96559c6c58a96d31618abb82504909147a3b2bed7c5278e211. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZHNC2017252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8225049428dd0b4e50bd3943a9d4620ea40c50f9c35067e8749e7ec10c19f3b. 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/QZWDW2460936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1205676e6e77754eebe9904e7f4f932c864e11c29da6a28f616a6e7fbd20d3a9. 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/QZTB32424461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3f45ecc7206adf3215aada407bec07d44e0a507d1c7070934b1ea3dc3a980b. 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/GBLFP2157050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cedd4a331b4fbf3fee4b705fbbc830a7d2cdc9891e5afe24426762aa795992. 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/GBLFP2157056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0577607134782dffe1e2035c27c4d1dedb72dadaf142d129056e930853ebf794. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:37:43Z), 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/QZFZ32218738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3dac09f6c677d6314b54f5934da3352b10022189abc280a31b42e86537022a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBLFP2157054.