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 0xaa09c86af9defe38fead8d8db88161299665edb0af1bd066823d6bc677fbd94c. 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/278a5e91-bfcb-4360-8305-761de73cfa5e.json and https://artists.proofprofile.net/proofs/artist/278a5e91-bfcb-4360-8305-761de73cfa5e.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 0x1ad7f6625bbc5f3c2db3531778fbd20861e45e6b90e9251e7984aba273c10538. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBSMU3511444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79648578f348c89e538bec7bf568ad96c591104dec226cfc42b1830f3c72dc06. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBSMU3511445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe36c67dbc20bf2650f1c55df6c5ef64828f905304dc63845671d3c9057f79f. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/GBSMU3511446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310683398f878b24d0318e9fa52413e0f6d7ae12261837eb6f6396f153a4a734. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GBSMU3511447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bb1e7604d61b0d328ddf9337262ab5b68cb5c2ed969c3f15e2197ad3b533e9. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GBSMU3511449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c10bdcc9f9f6e9fe469af686b5eb012b0ed21069c5092220fc65cd24c4224ca. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GBSMU3511451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0aada216207a978b92e01f9583a829142092dc746da63fd0db50ec192ae1f1d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GBSMU3511540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4fe6a4ed398b62880fac946acac8cfcbacd2f8b48095f39aaa13dac48d1c40. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GBSMU3511541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63278d5b92ffae7c2b13b3bc03ea02a09b62995d8a0fd8020bc9d8c517de0a39. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBSMU3511543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671c45d3b649fe7599b9f7841829bd153252897c2b0bd78d8925fb0f47edb424. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBSMU3511594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0773014b3e044591a0571140f012921d11a85a680ef7e22f357f23775f21546c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBSMU3511605.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697260fb026a56f4792d07191dc54b7c1ad6774cb230992cb27f1d06ae2ecef6. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBSMU3511727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acf7cf68ce311a7216b5d67195a4f68193df5df563564a48388bd3dadac3fe1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBSMU3511778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a48c66971121b26d4fce3f08dbd3adb5cd20285488650e20a6c2b9dfac53435. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/ES31E2501556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2b2cf111e289b40a7411dd47efe418ade1e94b775e7ae19385c98c9288edd6. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/ES31E2503847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fc2ddfb405b6b191759ccea7b335c0f0d3a7244e1085e5352c34517f830516. 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/ES31E2503848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae3c37dcd989f2ce50af84739cd15b9f43922e1685821e9c29513dfedd4cae7. 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/ES31E2503849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813050c5cc9c6e05d02f9568e3b4da8fbdda3a0b5952b105983905db7b5c5436. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES31E2503850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5916eae74a1d46540df3c348713d5a86a15e919625d87f004011506101692a0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ES31E2503851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55b06d4ee7749dc7f33eeadcb6cb06ef1d25f4199c8f256cc6cb2e1f5d275e0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ES31E2503853.