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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 0x68dd841aec9ea9d3ddec2d84fa6c5023c9e5022aa5c4783f8528d91a5c1bbbcc. 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/966a90b7-38f0-45ab-8996-d9531387776c.json and https://artists.proofprofile.net/proofs/artist/966a90b7-38f0-45ab-8996-d9531387776c.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 0x6ccd1874d5f2d78ddc122e890d1a3c58cb9896a3615643f58283d689b8e9296b. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZK6K2239429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac27056cd35b9529f7bf813186a235ecc1a22fe378567c882f3bb09428926f83. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTB22328949.
Your way only looks better from your side
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a884ca890cf486b7afc2df2346ebd6e4aa2ba010d497c11c32e0748191dea14. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTB22328950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89d720836b8f8cb4dc7d516bfa363402b4df10ad227880c6579d48fca3fe9e2. 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/QZTB22328951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe835802ea4bbc45ebd3194b7559e8f51618c1eed56777a66ead892a54206f50d. 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/QZTB22328952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001e30ba7f85f3b985370c7f155cd636103465dc89f0bb9f55e93b0abdc9ecda. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZTB22328954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1709f5906560677240c0cd6a17a0ddf365a1ef0eeb8189e0afbfc3e21c3ee11b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZTB22328955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312961d5fdba8577094727ebb154ffbc29749f55f62f59417d46fb8b5399747f. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZTB22328956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee2fcdac8b60bda23ab72f6515520f906fab7f4c49d97920efa413f423a6893. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFP2464896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b992d3188bf24836986a38a62bf3dad88e6b97e00998e20f1b4e81f4e38d8aa. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZWFP2464897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860d230543e5e7fe39fb10d3106fadcff6cbdf07ed65472f3c9e5b1027da91d2. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZWFP2464898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814540dd7e14579efaf012c6b00be6635cdbd83c5e30893577244e0787360e61. 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/QZWFP2464899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db48138e38f59781b53219bc553f9db06677bc273b6c5b296443f3a7643abe5. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFP2464900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73de9fbb3c2159b8f2c751c5ce27decc558a7cfc85fd9a9f6689e09fe12ed65d. 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/QZWFP2464901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19825785a6dbe530944eccbf1fa045b1d93cb15c49c424e825efe7d2eea4f747. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFP2464902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27b8eb7fd647aa3f9dea05129dfc0dd9310712dd193c1e89c344d78e93332ca. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWFP2464904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9109d6e013b420135d7d5130f7297810264b0aeaf8a037a640bd0ec741199399. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZWFP2464905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd661f8bd794905d6c816ea79a78c81f20cbf3ee17fb9bb358f56e02812d75a69. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFP2464906.