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 0x49a049689d78fd2db158eb82e10b175d938d4c3548de7544698b953e192a3b4b. 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/3737ea7d-9d0b-4f3f-988d-6888f2d7cedc.json and https://artists.proofprofile.net/proofs/artist/3737ea7d-9d0b-4f3f-988d-6888f2d7cedc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x3b29c715edb12bfa6e7ac838167a028b2fed8c48db50e617a76c084fcad2906f. 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/GBCKG0500658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2399de4801d5c7c1da0ed5a2a8d4a02fd36dbfbcbcd137ed75ea2bf267a2655. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBCKG0600131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050636ba689136313a3b9031d4bf03428c083c52b03da7165fb95e2f6b43b265. 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/GBCKG0600132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a626e5140541f621dcefbaeca57cc3a115f5d57029f0c7af7cbbaca1a923d23. 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/GBCKG0600133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fa0f1fb7b49ed3e0451a1dcbfca316a54fe183abf0763ad31aa8a5fba01b8f. 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/GBCKG0600134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6108a6637bf8c53e20c6c641ff3cf184f567ca5e6f4ccc577ee058c88a81fc0f. 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/GBCKG0500287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b7b6f98ca75f77d6abe79999316c467cf6f0332c58c66336d7ce3bbfe21e9f. 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/GBCKG0600135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1583729684ebed1935b44df6d18dd60312aeec9426d05ef2bb889ddc1181993b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBCKG0600136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e864552043bf5d67fda768235dfc2e22a9893b2da8a4f38157a831308d3a5d9. 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/GBCKG0600137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa198ec6ed2fb650840d698f504e31a41477954678fc50df0b33d51de578bc4a4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBCKG0500657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2297eeb81ec986c0198a3fdf19c0aa60c9bf56e351b1b9eb0432a1293dcef1b. 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/GBCKG0600138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b050d2111deea4321ed2848c35a49b2b2d8a7a0627bf4cfde2f08dac1118f0. 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/GBCKG0600139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb218382ec0044a77fe9517b57a7e60040bcd7d48784d991a8368f16864b428. 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/GBCKG0600140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b29c715edb12bfa6e7ac838167a028b2fed8c48db50e617a76c084fcad2906f. 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/GBCKG0500658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050636ba689136313a3b9031d4bf03428c083c52b03da7165fb95e2f6b43b265. 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/GBCKG0600132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fa0f1fb7b49ed3e0451a1dcbfca316a54fe183abf0763ad31aa8a5fba01b8f. 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/GBCKG0600134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6108a6637bf8c53e20c6c641ff3cf184f567ca5e6f4ccc577ee058c88a81fc0f. 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/GBCKG0500287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b7b6f98ca75f77d6abe79999316c467cf6f0332c58c66336d7ce3bbfe21e9f. 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/GBCKG0600135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e864552043bf5d67fda768235dfc2e22a9893b2da8a4f38157a831308d3a5d9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBCKG0600137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b050d2111deea4321ed2848c35a49b2b2d8a7a0627bf4cfde2f08dac1118f0. 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/GBCKG0600139.