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 0x0d2c8f380e33f4ee6b5eb5e59ed201eb12b977c20ac90ba925a93eb573052f98. 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/a3498b5f-23f9-4b3f-881c-4bc95cf51498.json and https://artists.proofprofile.net/proofs/artist/a3498b5f-23f9-4b3f-881c-4bc95cf51498.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 0x1c4959dc972de54311f4aff53223116e22eeb822193eb4c37352c9335656d39f. 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/UYS051500218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27c061e284c63693c21f3da78bcd190d3634942f23eb1d8a15fe1a1be9819f5. 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/UYS051200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61573d9d7b3c2d1f1058ac838505bba43c72f7ae1e071a7c2ef87c6197bb17f2. 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/UYS051200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ff3bef9355e128afb1a150e66d5e8401acb3d05325a47c8c78c4012c73240f. 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/UYS051200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519a10a892ce917c2bf3ed9224d323c1e2418e8c992003e31b4894becc9c86e2. 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/UYS051200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4631ddbad702721536969b34a83de30a540e6c1aeaa3b0bd14825590a271d174. 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/UYS051200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f1e0f1c4021100a5c098d7e8cabbe76304756e65344a863687f53bca9548ad. 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/UYS051200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e38470128fe99cb8ce644460434d99d8087543871e0858589b8d731ed87efe. 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/UYS051200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32421d9aeb8c96e4cacbb655e5fbdabe096a960cd1748cf04d13a704254e47f2. 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/ES7710825601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38c65c29b9225c50e9fff318111c99b8fa97199dd4049d5bd456e65545b2b79. 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/ES7710825603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11916ed077d2ca0106fde29f9c5b3c11ce34da48603058456b0440af796820a7. 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/ES7710825604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584320a42c8e3e707cc3daa10e44a0a856b4c7102341f9adc648fd7011abea61. 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/ES7710825605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f7cf6166704adc8d75f5b7bbcee2a4895f00485905277fd4e9dbb8b6e80fad. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ES7710825607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989e88761523c8488bde5fa7fa94d0623a673bcb55520ef9edc24d2ae7dfa88e. 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/ES7710825608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cac0d041759194f7a81df259fcde7b1774a5ae7677803f4863a34270622646d. 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/ES7710825611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8556af9647bb36911c56662129672df3117a3b93ad1ce7d0f8bd18ebf104abef. 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/QT3TB2421117.
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