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 0x24dfb9439f62a400e3fbf232f0479649e05fb2c1271b051758a0500408412043. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27f03bf0-0a77-4b0e-b4f6-c9a601073989.json and https://artists.proofprofile.net/proofs/artist/27f03bf0-0a77-4b0e-b4f6-c9a601073989.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 0x848babc8f00ca714c7ad4f1ad8f98687615d0733959aee768f71f4f082958f6a. 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/GBJAJ1800555.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e624a3f2b4b34557c13a0b814ddadfa5f6f6bfd2b6e11154bf451155cd6bef6. 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/GBJAJ1801221.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771b243eff100ef90e34b71d53f0534676858d2e685dc141957b126ac2d86064. 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/GB2DZ1700055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b9a46ca9b69f1e99edd574895f9131f929600bcb7c9b7276c780cf1fbbd0b0. 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/GBSCL1813016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeacb1326e54452c9908a367857e578e8d2c41f95e876c0f1bad9f4b335a365e. 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/GBSCL1813019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ac21b656f1d2d5e523db70655f79a91837b1d07082edfe629f4f5bd475ea54. 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/UKGGD0600042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b8e03fe5fedbd2773a7961d93c6bb4660cf31f7ec8431deda15b9196d56392. 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/DEVY91800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed75213ba1d7004700455db5685893d3be3ac5474b992080ef7b02710454f66. 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/GBSCL1835074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe261aca44fce7794a838d97a5fa9bee7da4f255fa4f296398472227bc8f8b4af. 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/NLF711807221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd623e496c119fa693d27f59fb353d022dc7d54c81e7a57cdb7c86a3da15b98a9. 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/GBKQU1850332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651242879408c78820412b796746a506e9d9be4b76aaf5cd876fefee23e68038. 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/GBCPZ2423091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8459a42f1614443d6f43214413a70ce4ff788bdf3124c5da641bd527613faa5a. 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/QZMHN2005686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4770819f4e06d329bd7882b9da986a10a1aabfdd12d4b4bac765981c1eac1b3a. 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/QZMHK2007215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefebb963f84254f36da06881fdd7f5c9d9f1e673810c947332b7f5bf8b5771ee. 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/QZMHK2098208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48befb108693bfeb32f71d29a790701926d8c9a7acbc92f557338741a728ce38. 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/QZMHL2016786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a201de3a00981f01c6eb221c6b813d00f166afa47e2fefbae142b0dce2c22fd. 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/QZEQU2039960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c78741bd1a1e07ca90d22efe3228cc0e4a79afe63ed8adb2ad1bc0d667f99f. 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/QZMHL2056953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afb3d981fe9e33b068a083bc5f200a50a1c17c4087f93de6444e60359475155. 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/QZMHK2036725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b070688c20a610c0a3ed3f948f0e1b1d10661ec8ce4350a66195a64f842878. 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/QZMHP2079026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0efb47db58803910965f86dbda4bdbb684df9d29e404960f2dee9dd9e06786. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZMHM2063567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d2f0efca929f9171d1299f2b61c09a3bcb938c4e092326ece3ef05bb079c51. 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/QZMHM2023590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c3af7927b41cd607d2d133a469934963a8484772b727b0e1d9fc121b542d67. 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/GBKPL1947851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c120f336f9a6176d0d4276191a056be4ec1d851fcb7736c778a6ee949235cf. 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/GBKPL1947854.
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