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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd608370f02f1a57d3737113742cce68a54b18918c951877df6508272c5d28f2. 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/bab5c3a2-425f-4083-84d7-d5d8aae543d6.json and https://artists.proofprofile.net/proofs/artist/bab5c3a2-425f-4083-84d7-d5d8aae543d6.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca2cefac5ad389360dfdf9b05c958ee7b12f7c0a45c069f987eeb8f61c1a6ca. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5AB1981656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9617a5510204a449977d4fbbda3b88a0e841d7dfe645545eeebb07860443b3c4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BX7AM1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa397f21cbd416be60f1e23ed5cbc3e75d59ea590df75fe4b8589dab81b02f42f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/BX7AM1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b91650227cc22c816268ae7e3050b09045c15e8133e601c2fc3f9089b8f0b7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BX7AM1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc920bb13b47bded0c1af81db2d5c045579886290bfe54111c4e2baccf86c3f4d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US7VG1863955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd691f76029c1c38b637e7c2fbb2efe1bb190c8a68fd478911913c2fe7fb79cdd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BC9PK2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63d255bf4829beadc835a86cbe8792b40d9941339b4f889015961a5517860dd. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:56:20Z), 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/BC9PK2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebea74139a387319ddd4f6f8a4e0d60d66d0127a4c64c49a3646c441a270d7dc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BC9PK2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab765e7c2b5fb5c4dfd72f1f00a900c6bfefc548ffdd13e1bc4504032ee51cf3. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/BC9PK2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3fcefb9d0caef018ca863ca161a92f8ebbe7807100617dc4d08cacfb30abde. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:04:25Z), 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/BC9PK2300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b54a1b12c48517ee28217cd49baf110db0440c61353f8beb469ae9745fdad86. 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/QZGLM1957580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea4449ebd15c8a3d5838350b06aecf310dc15a93d8b35f78942cb2b04cc4fa7. 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/BRE2Y1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d025de4c0e1d9f861912a7345330fdb24c30aebd4dc63eb54e5583ced5eefa8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCAHM2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b568bc16af8a26d31f46d9634ecd8c8fe3ee2cf9e80198e22ce2358914e37d. 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/BRL4M2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0044621f6f0852ec102eb5a4d1b8f23305f65ebf46c75866a9276f7df0bf493. 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/BRL4M2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4e6766f2c540c6ae06ff6d32bf74cd20675c2e1a75d09ae7949a8b144e43c2. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BX9HD2000001.
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 0xe6a4976220cd93962c4bad89324b7bcb7f3e00c635027e1da7a235434a24e902. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BXLPN2400009.