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 0xf46235fd5716aca1cdf5ddfce91ad2c0d443bf9a0aeb89e14c3c449d0b0d3aed. 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/67c8d047-9f5b-44bc-9d97-554def1e52c9.json and https://artists.proofprofile.net/proofs/artist/67c8d047-9f5b-44bc-9d97-554def1e52c9.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 0x7c0af4b54fd72560d3495e0fd8ac00bb4e7a8d6b40bae2785231c758901140ba. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCJPU2366128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328ea75479fa1e05b8e25c56b28e47ae25e5fbc62af9b0986651960a2642b4d7. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCJPU2366129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be99768316fc6b5c2f81c56584d085c298ba59c39c8f3dffb6d8bea6c18fc4c. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:29:53Z), 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/TCJPU2366130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbdb55a9c962e7b9063afbaf92fe91d38264eebab95549c8887ace8ac3c471e. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCJPU2366131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2418eea87e82459a8897884bd1bec2c2b8f4eafe556ad933ea3a1951b1d251. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:38:58Z), 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/TCJPU2366132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d52274fbc9af392221e38819f0da20eb7a102d7fd7e0a2d1fa5b20cce16ab4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCJPV2335457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3fd7cf66de95f5a6db91425db66ef83ce2ee79aadee859bae684804633b4ca. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:34:41Z), 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/TCJPV2335465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24178ffb49bb009d09dac90e8c24637965ee96708862e9089ce41cb675258581. 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/TCJPV2335470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7bd74400f7da589bedcb8a1feb7406c2a2dd8aad2555cc5b43bd6c314c7c7f. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TCJPW2311629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e71b2762738c6b97dfe06fc1c7607e6bd3064052f729e8489e4f81d2093ee1. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCJPY2341411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c852f9175ff34dcfd04c8880b4f51c2dd0a17f1b0f212d44f20f745525fecf. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCJPZ2420123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8937bc4a3ec21fedbc58d14d468e6a0d2558930f2b162a543f76730a75f0ad. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCJPA2416602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3983241cbe89556cd18a2d5e62c2f41c5cc3fd0024f867f1575519922a42a9c. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/TCJPB2424987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdce6564c94c85a4e3bbdf4eb20e983e8a4e752aca9260a6f56af762fe5c8c86. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCJPC2404311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc774f3b4d0d1c6b4160e022f0ce4fc22a091c68abbe3b78fbb0da96259f72118. 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/TCJPC2404327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0794ba69b9c2473b67a2ecc4c9fc3bc3d8dfc25ac1a1988268e206c2875fa1fa. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/TCJPC2404351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f87d78fad9498e1baf4f026eda64f84a679edabbc280e68deb611dcdfdc9c80. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCJPC2404359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93fbd44002db8a90868c79c7108c42c9649bfdf60ae62c62209beecd11eaa23. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCJPC2404368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf3759a01c38fdbab041bce5e46b1ba3f2fe426573fc55176055db27056bef9. 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/TCJPF2506596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6998f54244a3b7dca0a2abab80347b37e91b6b25a5380a012390c3d8f49449e. 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/TCJPI2530699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6146ba7a02e32c911f1665f48dce2f05dfb777120721e4d59d96de5e20fe1723. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCJPI2530704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38ebcf68a726cf641efffea285c82e743e9c22d167d6c2168a52b7207c5a72b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCJPI2530707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24b2664a00bda5a18bca5b7384ad4812266611b0424d99050e87332b4069567. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/TCJPI2530710.