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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 0x22903addffc012318fb717370b787798c2e0836887438025cf18879910717f95. 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/709a63b3-bc95-47f6-a413-a9495ebca50a.json and https://artists.proofprofile.net/proofs/artist/709a63b3-bc95-47f6-a413-a9495ebca50a.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 0x828452ae66d1dde944905a0b8a95492ad2d5c480643895fa6add4f91db4e125c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPB600541503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50416b49f720fa96d409965f8e769219d016f396093e7de31bbb829e278ee47b. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/JPB600543201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e41701c56266af3af85ab2ed43e601994bc3382365404ff21665cc25e015e6. 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/JPB600543203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d52b434baf81a061efd9cd8d535f8d26962ed985c4b975a29303c3bbd16659. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/JPB600488802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b14c689c1330669f5752cf3bd1cfe75eb243e2583e7afce92d4037d15933d5. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/JPB600543205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699466122da1598066b7111524499a39f770d7afb1501bec22a98d26a64fe16a. 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/JPB600543206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d293c547bd74eb76bd789e4bbb37c23b9b5a82e41f75a5fbbf39d85b05de66. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/JPB600543207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692d1817a695a1b8c4d2d5956c4c59549dce13360d3f1a8dfda403eef7f12d4f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:25:11Z), 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/JPB600543208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc12261f004b8beed47434a2a065569cb95fec03cd7e352389a76c85d2b832bf. 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/JPB600740404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6f9928e213ef48b666f94f5adf5c14e743785bab5c680198f3dd11f66c13ee. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPB600774903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3833789157f1ec390ccf991225107697f5a1182ee0051f95a520940713217a98. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:38:57Z), 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/JPB600740402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3833789157f1ec390ccf991225107697f5a1182ee0051f95a520940713217a98. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPB600740402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6064e96a5ec69fa5378dd141209ad8965b1510a6b8ccd7b98a1e00b5d8a56e6c. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/JPB600774902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695ed3dfd6ceeaef4795762253fbc0ca83337c1e1091a771edcfd4c67968000c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPB600829813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3de8ec751e396b9216702e48a476a00d92f26187ddc2bdffeb717a948eb340c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JPB600829804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c25249b3cca128688f6daabb9cacc10add01af617f3d7267f364c817777bff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPB600829802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5e047578956d894e98e8467b19a33bfa34540dde3a860c3f38ea66e04ba588. 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/JPB600829805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090088e3e5f03ba5e783fbabb3a4d39e6b4c4efc31e48a2e89dc283447ce9572. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPB600829803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7d63318ed109ad13aa18c918f3c9df4dc09ed14c7f1791b26804493f810f60. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:10:59Z), 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/JPB600878202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f29c8da94f8125e6eccb3fff7792f3ba27ce3bb87391cc77c341dfb9fcc044. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/JPB600878204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb88ccb117adae54965746e2364c24f71e3d354253cd9f59be2a176ae59a75f0. 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/JPB600878205.