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 0x9595fc091176e472b87a6ff40f8481d6fd510cfb682771da9916ac9c2f583d56. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e78ed188-b3bd-490f-b0cb-78d9dca24725.json and https://artists.proofprofile.net/proofs/artist/e78ed188-b3bd-490f-b0cb-78d9dca24725.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xca2d7d5df4e52332f29cd2f1b7975394b1f9d8b2fd4bc8ae4fb6bb0f3217f01d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FIWMA1600164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b1f88a8c8a3fb9ab73672c4ecd6b2a1909a96351d1460213305b9a25eba20c. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FIFMF1200152.
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 0x3cc8f5dc6a3cbe1d750477833519a1004e06a606896e02643928d1ea6c0544b7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FIWMA1600163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcac3ebb542cb926450a23831a5f4ac74ab74e9b7da0ca932e85d6605dd3b2ec. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FISBA7600111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a725d6e8014881e0a34be3e2e85f7210501336200310b5dca34d059e2a215e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FISBA7600441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4ccf28ac9b5ab1ad1a7ef4317a70af1ab907b728e79c5d758b89d68813bf23. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FISBA7600445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a58f3537da84f8e8641d85bb4baabc371f2a6f74f5ea4756f23ec60f54d8f0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FISBA7600446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9100dcf86edc946bd3a4b71c2466e8d4d00b5249a554c853ec3730d268104d9c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FISBA7600447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e1d9e19fc58140b6f8bce5d4575a5bbe0808bfb63b0f78a80c2ab0ca2d10bd. 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/FISBA7600449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fda15ff2c56f3063683ef3e4f442a20326083480f628d6f1bbade912e318a7a. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FISBA7600442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38247768ce73483a8602eecdf44900903732a7f4556888abf3dec8308acb7cfb. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FISBA7600443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03e15a143a7a0cc59d3b1a7a73a5cf11f1cd7cc9ae6b13bf78af62f9fd57071. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FISBA7600444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec05d8f55d83fc5a43c5906b993526317f2cbefcec5c834a219164ea2822ba6. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FISBA7600448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdc4a68c6688e06e5de332cf73c800b53d11b495685a69749c3cd6480999dd3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FISBA7600450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a6dd06ef4dc9625259aefa7161c24e1062746e6ba09d2478cce7cf21b4c678. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FISBA7600451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4e001c2f863088a6b5b37d80584b80f3b3554fdccbcf5d5d7023991dfeae39. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FIFMF8500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a10a02e3573c4ae4feca3dc2bf99673a8a5f5af5c27207576cf9ede2ddaecc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:59:53Z), 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/FIFMF8500087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76967061ef9944c196b295016f7ff879419d3206b41fa5cefc739b1e2449a121. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FIFMF8500092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563ef822fa48820a0c688525f15eb14068f4a8c95376d5d1c0c54bc3e812558d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FIFMF8500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37ce603eb56e0380b2b07b0accfbc5fa64b9436bfc94b9f27ff227d320b6a56. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FIFSC7900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbed178bea5803b529e3e543d37e77e952cd82d66050c0fbc79dee5b98c80213. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FIFSC7900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fa88a5fd17c06b84db99576d19aec073cde8cdad388c0872d56e9d59f16c47. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/FIFSC7900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5586bf2008cdf94f2cf6e46243ca9678cdefbaeb9ea8a6cf2de0c4fbb247181. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/FIFSC7900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847830da204783d7d232cfa317e2a929f7ab576c9bdda36112a96b8916d20b2f. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FIFSC7900030.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ae1261bd1d6a00201c448f3133d2f0f00bef268d3e103bfd76f6e91cbbc369. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FIFPS7400002.