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 0x138edb090bd8928460bc0470f20f90a153d6a4e17cbd7f8a0f0c22f8d5626ab2. 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/59fe7ced-a102-435d-b940-844b47e1c74e.json and https://artists.proofprofile.net/proofs/artist/59fe7ced-a102-435d-b940-844b47e1c74e.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 0x4501b541e8908d225eff0caa63c3035b1b14e98c5f6f6245f7a3a77ea66ba5bd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SID051500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999c9b82176265818c9477f74fd7af9ee2055ef853b1b4c35bd5cce706644a58. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:53:40Z), 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/DEKB72041211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca70abeffbe56fc47eba7adcee3602a186e90536618e4d14e320a040ed9a6d8. 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/QZDA72052915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066f259bf3ef7c215226a3b7d8ddc03e605175ad135758dd9357c00a5d3431eb. 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/QZDA72052918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609ecc7c05c2223c1dc41cd31eadee0a62bd2bc033a36fd25e78157d5ec3814b. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZDA72052919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa7272593f2586d7bbd3846828237bacd0c537671eac040044351d05b82354f. 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/QZDA72052922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4935c5e26e408d0091f6fba9d3fa6fefdc134103417653bb2f4461f5590e9b0. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZDA72052925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569275bd6c7b39862cda3802d6d86bcbcd7e70a2fac2368b7f1d9e141e10f516. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:21:37Z), 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/QZDA72052931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76a409ec2505efa34d3adaa1337b6ac53d252728756bb2cc1cdd2b20b03d6ef. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA72052932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48fcf58b08696f5f574a7a98d93aca2dc8eedbbd88930a3f4e4fb101f268c78. 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/QZDA72052933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d03968398c4b37cdfb144626b713e12a3bbf9398a2c48468bcf7b1aa4446107. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZK6N2066891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf922c2213d80aafa93d8f14d7bd5e2d8f01f2a00661272aa79e75aec4091ca57. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZMER2013402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8639771490de44553ff40b21eb1e955ff15e48e6b0aae3ba9cf0287a1718c9b3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:30:34Z), 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/FR96X2112885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5b3ddf936a68637a31b818f3b7b509a6eb76e4483d4a4972fa9c06626d16f1. 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/QZNWS2263628.