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 0xd98972e6052818e7ab34f21c6116ae6ef945f862acde0a4030be449296063f52. 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/2a69e9e3-1559-4df7-a9a0-1122f20c3067.json and https://artists.proofprofile.net/proofs/artist/2a69e9e3-1559-4df7-a9a0-1122f20c3067.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 0x90355f6188086258de5ce4b7d3e02cacb33fe869b51008dcb3c0088f4ba276b1. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/DEC158300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cbb123554b0deba864a2853e2fed5f8ff7358abf87ed7dc80f217872106b7e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DEC158500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6a82a8aa0606e086f1be6a99032a4892a6f33591985f883052e273d5c8e3d4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DEC158400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15575c792845b716f4f6a0cdff577d4fcfa635bd91cd5c79e6fa25445da11a5a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEC158400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c59b0b9b1551030b637689338fcea7329e93fa0cfa2e13fd5d2ec64e9bdb98. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEC158400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22436f84264b4f818e54df54d4daf31fff93f11994a88cb4a0a3e464784fac0. 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/DEC158400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca0d251c965cc4c70b094879d1c94ddc96057d30d5bd2b8e5b22ee314980238. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/DEC158400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec8c082ab0f95385490f91996dce072d2c74448e4ebee4f5613f63d7d06f4ce. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEC158400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe124cfdb114fa9ecc884496aae9f24a64a203b493af3b757f728eca1bd8c6b16. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEC158400011.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec30f22abb088da5d7ef0cbcaef418be4e19dc23d6ecac5c5f5174062eb35f3b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:13:01Z), 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/DEC150300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c59d9d60b6e67f1148a7d6ea1713c32d4803f5f91383efc1f2f0daaf68b2f01. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEC150300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e194c4f9f8c7f0d7b14fd9712b940a5150b2db144e282d239ee23ffe64010b. 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/DEKF61500007.