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 0x55a6c894a2141622bf50122f2641d68b68f04cb68f614de461f7e875457e54fa. 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/015cd987-5abb-4639-95cc-7300313c3e39.json and https://artists.proofprofile.net/proofs/artist/015cd987-5abb-4639-95cc-7300313c3e39.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 0x8251b9323fe96b3ccbf202bb96af602cec7c34d12e054b8adea9eff3cad804d2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/HKG732312767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4aeda115883b94ae4030a221b643286d3dde1d4cd31e1c5d656b082c47c788. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CNA231801849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9358344ffe765e24e2d89171f8a6c9c48cb7bcabdd891e4e8881f7e80b6417. 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/CNA231801846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f7ef37cebfde25cc40788d00baa88af6d9e79ce9a382057106a7e848d4394b. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/CNA231801853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2483147c2b3879672de33db2d713716758cbc88d4cff65fa11f2f2259d6a519. 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/CNA231801844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877299361a592af57116139226b7efef5a892b9df1c9df82b2b1097726cea757. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/CNA231801842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ee38d9a62b66de68c04a3210796912cca27fef720a3256afc3934cce15556a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CNA231801847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fb42c34e73141d4cb1c2b77c072f79a319c7325d1312d14af92379d6a24adf. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CNA231801845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f352527217034bb5a0fcf5d0feb2a8ae9eab25960ad2735f3ba43b746f4de15. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/CNA231801851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c591abec003df2bb00706457334fe09329c81b9ff7fe9d912bc42fcbe68c634. 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/CNA231801850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd55dace86b54fac510a5e7a30e9bf34ce109a9fac9f587a1f2db283c61442a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CNA231801852.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f75de269b229cd994b92b4eaec4fc31b879720f0147a58c4991b4efae33c52. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/DGA052213835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d345a9a4d6e9340080b3cde37f1079e27438b66641ec20b02250d6b3e82a7ca. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:42:14Z), 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/KJ9158910412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23de2a913228065f1dfd782285d94584224911ddda14fc59a666c9b052ecf25f. 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/KJ0987446362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9edf689b7a6aa536fa49517e32ba374f0a27d766133659fdc1cafaaed77f22. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRX872583609.