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 0x962ca98c334b481752add1e16724b143ed27cfe5bfc0f18093a630aefba683f0. 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/9eed7510-e740-45a4-b289-3a25af6bed14.json and https://artists.proofprofile.net/proofs/artist/9eed7510-e740-45a4-b289-3a25af6bed14.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 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 0xcb2afd9da2eb9b445533bf8e29d7f5d9471ab3aac8477bb86528bbac7645e886. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA112441194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657996014e818b340eca9562583b057d2238dd2b80a616bbaec9ac1ad94f335b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJY2432439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a4137b415a9ef2fc95f2ae4b3d8ddecd43df2206b4546e829058b76227c334. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BK2242401581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce49ecf9035eefd0762754c245ec9ed613bfc3c63e96210a034d6cdab027509f. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BCIH82402162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c0121df14225706ea4eb79e3b4bd67eb4a4ca1a7168df203d74e126932ce8d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCFCV2400623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a6996d75ef2f9bfeba0515d2ed8bb324df732a6980fa731928735beac63335. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCFCV2400482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52aa07a9b0461c3b7e10b8b58070217ab3e1c1b2c487f8bd074c1d96e3e07a69. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BCAPW2300215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b9a2a336325cc8b1ded1fdd77feddcee3e9042558172e6591f53be44b08b99. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXP0K2400999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0f92be22a2a30584f10b8a8d0fb80a549ffb61a621ef8b3cedb8206943c7f4. 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/BKP9L2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455d5d5458cd544b285b8ead4022690f455e451beeb44e27d63b7bc992b36f14. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BK16P2400341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af7d919619d61b67da98faf719fbdc826662135b88d180d6654a1de14683015. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJY2495891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59a8b63d8a6b540678df32efbfcac63694a4794e7ada871a53ac9a95e985d74. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ESA112443601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0812401a0b47a9e28b120a1e643067efd011c3cbf7e5bee189753d2f2d7b749. 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/GBRKQ2572305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22593efbb47b04e33d4c9e09b2b7f8c4aaee62ed283d888f6ddfb22e32492632. 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/BK16P2500218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00f575e23ef99b5455d7abac11925c051810ebb8aa6921eb2df6f1a05f20dfa. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZGLM2522277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb1acbf72dc4e54370950d42d35f9527732bf4b5bcd68d552153bb20be4d5ac. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZN882550853.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace7ef8bc0ce63c6f055af2aaa39290478b166269e1b0e04b36190e3d47ae9d7. 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/BK16P2500216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b7a9ff2f2cc6cd7316f2cbff02808ed02bbe3735189531844631ed194f12fc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ESA112561911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7617b1323ff1ca47651cf7a13c06c81470d258ea04143bc78073113cb034f2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BCIH82214935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bbedbc2c4eadc1cd061ea618e5105e9e29b3159fd00c4529e564e9be56d0fd. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/BX4IU2502351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14fd0a0af45fed71b12d67e71d3520f81210f2144c3b2275d7441d22367ed96. 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/GXD7V2505528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d63b7ee65d9c500540cbf9ec22c4dbabf4bd68df1e63387e0da42706f7aeabc. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/GXBAV2585118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd995130101de6101fc561dea774788772111ea8893dc23856e59c9816e4e412b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GXBAV2545480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de682a5cfdb37d3d5f5721b18230fcb452f3b132a392d722719f4aa25ce0da1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GXBAV2573684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dee737b778ff1e54804b342a1b3554e22b20ee2486b2a1952e5e0465f077f04. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZW9L2320549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3671092b1ea53f14b53a2d19c623fa102edac18b8e3c3e946c6e30f751fc34. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCIH82202146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd437697ea16f353c04d50b172563f61494628124db560fcd7db20ab60637d02e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCIH82201677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebb5b3892ccee85619e8402d458c5939742b5ba90f4acab0b12f45004bd034b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9L2320550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaca267e3eb0d62e4a4fac00fd68f1dee219d83ea64b7fe601d2821000d8b9f3. 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/BCIH82400086.