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 0xe07c8c291e17989409edf5166c82e143c897853a1bc1fe3d8708c5054241e4e0. 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/de9f7820-9104-4932-af94-2580f88fb6c7.json and https://artists.proofprofile.net/proofs/artist/de9f7820-9104-4932-af94-2580f88fb6c7.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 0x016bb426c809d2620ea6f7c6b31426a005a0a889126dd5787dc4e10cac0765a1. 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/QZGLM2424525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4d37eb536550040fb31ba59e4feef044b122b48bfc5785341db05a6b13bd16. 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/QZHN72441490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722108233d1ac602fb44bb598cfb09e53f9c85ec6fccd579c0d38b3645fada42. 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/QZW9M2266484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5c46672d9d2ea5f92e0e1565fceff330bf96f8a842d7ddbad887df4846c9c4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZW9M2266513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd955d0b085d1e57285d9850275938ca56dcafa62d7faaa46f5c2108ca2748163. 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/QZW9M2266520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6afa75d0900f493dd1fe34db03152b4e0c27cae25d700faada584a3fdab9f6b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BCHB02200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b05a32dd9d1b1b7e00323bc69bd1a263173aa06bf2c273f1a80a42a825e33b. 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/BCZ582400259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc0d7a2ac746af7f208e55aa638f980d76f538987a8966958da5aaaf2a577f3. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BKCMX2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d986b106e9a90d1a6409a31c4c4213ef9eb098e8cc70da22cc37d741cc1774f. 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/BKCMX2300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7c031b58a070966d625072d6bd26107d0ddedb091d9d985141e9d6e74b2b45. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BR0RZ2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3d83c9098dce5210c7a8da9ab3983ce1b95359154301c6ccdb27a5195f87d8. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/US7VG2533503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5487742c02e213e6618a8e03147d2e139fdca18228705b4922aabb8deb5552d1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BCNJZ2400020.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5681467a6238d1d45716a96c83e0f82d3c0b3610e3ac1803c5f0ce6e2346b77. 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/BKKQL2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea6c5d60a79b9e7a68680a1be593fb70fcf4f240e2f5a70473a77b093d0cdeb. 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/BCOD22400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b4cca1420ab8db1b9b7fcd89a106054d971205eb825d56d634c4f05e985310. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/BXS2D2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01ee19817788924082cb087e22f7f69ba81fbdf39b7a9bfa68e61021268fe56. 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/BXS2D2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ef79156ec65596d33a85b3a81f4ebc3d3f9697552bc7a1791ca0574e1b5cf8. 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/BXS2D2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17aa2db9b57cf86e4730e2892a666605d3bd05a3cce96f4394774aa5d86a7334. 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/BX1512400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd7cf7f3089ded4d763e699f998f5a3c84e49af670ff7850b5193f8f193a733. 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/BXS2D2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffea97e2c5fa9fa4b51233141c8fc228aab0a86ed21300bb8b2572c604a56a08. 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/BKOLK2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba8bde20b400147e23912ae4071a567c3d5b2e8d2b274c8c2c4c49eadab7129. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BXYR22400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fbe2bf4957a1276f473e62aaabbce569fe7d3aaef43d07b1e0d3d2bc6670e8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BRSME2401649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc886fe0b516c92add5038d1cf3722c85711bf0585decd37151cc659777c069. 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/QZHZ51958164.