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 0x1d3f578be90f1defce5768394695aa1871b1ff15b68288ef225d00edcbac9053. 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/d7679749-d41a-4739-8a68-9073a1790d1c.json and https://artists.proofprofile.net/proofs/artist/d7679749-d41a-4739-8a68-9073a1790d1c.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 0x5955443f77b5617f2ca4c3df4f6502ab166edf99aa980ed29ed8f0d5ab8bab49. 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/GBCEL2400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46517787b52b40d7d8ab2bbbbc8580e5fad2aea44ef559adef2182a665e63ea1. 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/GBCEL2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec806334471e0aeb70bb2f21aaf7984b9137b1a6a994321298c04931799eb75. 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/GBCEL2400346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5955443f77b5617f2ca4c3df4f6502ab166edf99aa980ed29ed8f0d5ab8bab49. 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/GBCEL2400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416e5bf006c4030430698194fb1cd530fa588d7ca93990e442d1631d2fa30803. 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/QZEWT2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122ada6ce5516425760ff6209fb747ff1d69da0bb90991aabe52b3030243c757. 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/QZEWT2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4db58075210dec35407908cd4ac4cc7ff0b18a72e24d01a6ba3d1640c4909b5. 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/QZEWT2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985b09a9c472c83d28682f28540ba6666cd78fb05e0030cdb07cbcc2221bfb8d. 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/QZEWT2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30570936ab9afe1c4b45bd14623433855bb2ee44d74a2df8fdd102ad16fac04. 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/QZEWT2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4985e98d0d8e9b1c360175170e9df5c5c9bc1b032ee18303a0643611a459b9a7. 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/QZEWT2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eae72764bbdc81111a1883e7e03c7a831dc26b4213ec21dedd7997badcfcad7. 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/QZEWT2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff98c587ccb5b704e8952304958dc19edfdb44f0d3a7d722e705d02f3617028. 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/QZEWT2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6434601f7de5f8ad98dd8e20ad0bba79c399bf86ae628c6457c3d39e3ad08e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZEWT2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53017fa48e89c02597d3f405d17d6077ef451dabe5c5aa67570cdcc3773936d7. 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/QZTV32244115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915e4b1a09529f16cc50853ff0e6500b788e257a256df0eb6b3edff6285d0efa. 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/QZTV32244116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e5b71d2af9867b4ea6c4bdea57df6f239deda54ffea294bf12bedfea94cea5. 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/QZTV32244117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b02a085e3e6509eb76d3fad444a71e83a48bab9f3536d0f6e0ccf80774d65ee. 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/QZTRX2221744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335b5b42b62c15a81e04126d97a5d3e1eda8f792190731e4e4ec5c940d80c36e. 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/GBWUL2203229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b02a085e3e6509eb76d3fad444a71e83a48bab9f3536d0f6e0ccf80774d65ee. 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/QZTRX2221744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335b5b42b62c15a81e04126d97a5d3e1eda8f792190731e4e4ec5c940d80c36e. 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/GBWUL2203229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4229ab302bd746726702bbbb32ca06c86e5586158a7657a840c0c2a552381e. 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/GBCEL2400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c61a95326328cde1028f7a4ec133bde45f9fa487612b0f395060ceae4d32dc1. 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/GBCEL2400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c0666683c1c06fec17f017ea3ae9a1dbf1593ca988d26205fc41c249607e0f. 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/GBCEL2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f21820e1fa81f46f9c5266bc5331febab587a12ae81eda930aed19f9ffea0d0. 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/GBCEL2400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978d49cf9d09ad15c87a883e779565e41ace8a9188151703aaf5869d7d9ec8d6. 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/GBCEL2400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22aa0e725e436af7bb969942dbd351b3fedae186a2fa5eca62d324186f024e73. 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/GBCEL2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1850448baae94682d0a518449718e6f577f5a267f139c1f9eb7dd48e6d2d9ee. 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/GBCEL2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6a25a168766e28549d8812356b61c5845144816dfb9de1fea34227d2f65b1d. 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/GBCEL2400102.