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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 0x160181b613a3b170769691463da39782e6a5263db4abe3ba3f17af8db0c20670. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/adfa82f1-d0e1-497f-a160-15d41575eedd.json and https://artists.proofprofile.net/proofs/artist/adfa82f1-d0e1-497f-a160-15d41575eedd.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 0x32b15af44f7e7e1d3a2ba7f2124dc9124ad1e7913f7c0a54ed47fc234b2139ca. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR59R1990324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3383f8e8fda25880c23bd175ca03efc138d5d96cc131f67f635a0556a68d712f. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/FR59R1990325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123e2f9ffcd3b6e80bc3e9d3e6ad5c77130fee6c1b5cbf669c63b33f36fa4166. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR59R1990326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a12641b849ef378da526459e7c0a0d8a62f2fa68e6eb2964a1b717138cf4395. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FR59R1990327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf3b039af00e3a58d1413a6325e91966b266fdd02a18cdb8a7ac54b3a985e14. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FR59R1990328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214704df6e0390b594fe3a28ccf4e36c12e50406dedfd30eba4ca697592681f0. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FR59R1990331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966baf87c274b609b19908a1558ed0ec50ee21611f3a627bb1fe207acd22b6de. 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/RUUM72100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5069124074a8e2cd8f9b79543361a888ca025ea527f641ff30cee1798f080f90. 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/RUUM72100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97b713d6df8794ed294888269f62dd44eeaceaa8c14b7ff5ed87cf339ee1a65. 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/RUUM72100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1ed27708d6f139f5e583a4e02e812b612e6e5a0e8cb3b8139ccca9c7e0118b. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/RUUM72100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2226ead3c99d9b335b979de1fd15f2b66dac574326d0c0ddbc382f27f3784673. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/RUUM72100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15297a8019b5d5e58308a99de1079fda9a4facfeaa00aa832874fd41ca97b6b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/RUUM72100882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323ec8c8ae31f3c0590b94828e93b62b064c753c7c415d347652bfa526dede29. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR59R2463790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13573a6f35e795e6fa6c9c7dbadf847df82b6f57b281df68ccf428068abfb5d1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA0S2402148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fef51aa08bdbe44bd86d7828893a7c4a4533baff308036f4a1b8f3273981a8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FR96X2582082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd2c42960ed68031013d78f32ac2ce0a6d281a8a7e34f8b15dd69a722307bec. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX762546234.