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 0xf80f89c6fbb987b3270f80b310dcf14b0792f0b38df0d8701877b9596f06b84a. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/980ba213-c65a-412e-a396-4c65bfbdac94.json and https://artists.proofprofile.net/proofs/artist/980ba213-c65a-412e-a396-4c65bfbdac94.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 0xdd0044d791ae895f8056a37dc36d124491314b222fb1f90e45fc78349aef7253. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:58:17Z), 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/FRX452353213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fd07b822492abc8efbaaff6aa58c4d306e7f74d4397bcd5d7d9be17a9b5d61. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SEXJW2302601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa260b971dfd087524675cd8fd565f30c094449a26d1abae8306af58b82466f1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:42:32Z), 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/FR10S2468002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fa331d26f09e3c094db0d2e2bd600b1d192ed36ece2a3198f707b3c5eebe4c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DGA092411881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccae825273d042d7cf78fa38d0f0f89f16ea4ee55fbb914d66a79e1a48e268cb. 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/DGA0L2417625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1370dcf403ce9c5281fea727c3b76e8ef7d083ff074e09bdf38c70cc03cf54. 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/DGA0R2485850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a3e617e541376563bb7dd11ce3938e800c88447676b6fb5fd22011e325edd8. 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/DGA0S2425757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8d4b2d52c6f95ab13d1aa54df346a12e8fbdf970e5d2bfe7f4708bf79b7f88. 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/DGA0T2403544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9361117cbecdd76e7a56d25aa5986b039b8fc2e1b8c8d5cbb0563cd214c0e188. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:32:27Z), 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/FR10S2589568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf986da65714e81fdd90d45bcfcf0bbe1d7fc4143aed35b35f64f8d35f5ad7c1. 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/DKO7I2500701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33736e974781e1cc038d0ddeeb0dfb59fd456e75e7b076c6aa879408b7e83718. 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/SEXJW2303201.