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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 0x613a429d1afe1604c724b9ec9307e1f102f3bca3d69e5371ed14b0483bf7b27b. 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/8ea699e0-56ef-49a8-9dc9-cd3bae979d94.json and https://artists.proofprofile.net/proofs/artist/8ea699e0-56ef-49a8-9dc9-cd3bae979d94.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 0x1932cd80943f4753a21e896445576b13f644839a9fbf1d60084088e701be9e56. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR9W12317425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879d44c4377aabde841f813d7e30cecf0a45326428b64d86a9d508ac99ea772c. 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/FR9W12317427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3235bbe8bfec884dfe29a029c3b5d6f2006bb99692284526dcc17a11d37d1a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:56:16Z), 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/FR9W12317424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1932cd80943f4753a21e896445576b13f644839a9fbf1d60084088e701be9e56. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR9W12317425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3040a9956b6b5176bf6af0efc4c6b8205da68e9e38f9b9843df86e87d0353e3f. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/FR9W12317426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879d44c4377aabde841f813d7e30cecf0a45326428b64d86a9d508ac99ea772c. 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/FR9W12317427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c387febd43b17696eed79a81a25907d5307aa3f45593b15856f3fa7865bb75e. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/FR9W12415466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e169bac5f51607f08098e1083539de9c48c7e30ec4e1cf9792bcf0f5619df3b. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/FR9W12415467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bfaf434c929d5af072c3437faced49e89215e104773d55c3a5965e538f74b7. 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/FR9W12433842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f8ad4c5938ade178345e81d097b4938b4d2cd2931b9bb665253fcfb9af7574. 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/FR9W12433843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebdd2fe5c2fb5d72fcece41203ebcac98898eb057e01b502528e84cf3ce0a66. 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/FR9W12215739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7567b3288ffbc532ba9db8debd8a825c1b94771a3de291dabbb32809983541d3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB22225898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e030d3a12600ea3294145841b0d7d35881e384c27c8165183e39f845c8c481. 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/QZD5H2000530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda605670de13954e48f96e763da9fc797b9d974794c910c28e5038c17714206. 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/QZHN62362938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eec7e5c3edd25221f8894a9b865e13501c1f9086aadbdef40e0f482b756e8a6. 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/FR9W12337763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3881798d661b8c48276c0c67755662aacb3696dd648576310f182eaaae1195. 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/FR9W12337764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a7823c5f6da638131b23de7e8eafbc731712388eeedff38ed20f7c860290da. 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/FR9W12337765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde59a54105c302ea173612d52f2c67d08ac085d4c62cba70cf55e7fa11ec02b5. 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/FR9W12337766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b235c97101cb52ea35139211669f68829fd541293e44677b139be37a80aec9c. 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/FR9W12337767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a9e1dfe062f2aad036d9dbcffc0663df332285fca45f362d15dcbf93ea0300. 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/FR9W12337768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c89733efd064fb14fcd71f7380dae9576045a553e388428c0a866368ffe273. 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/FR9W12337769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e7b20e5c2a6690bad9175b831337ebc630aec087f5f7c5680d4f362b6c21df. 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/FR9W12337770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f377b405c514d25fe3e07bdcaf30c1f20d2d4efcb8b788b7db654eec9da1d1. 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/FR9W12336990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07886d48b3497959cf5f2ad90400731e0a0c6299c5b4107a66292db41db03ef1. 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/FR9W12337771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f377b405c514d25fe3e07bdcaf30c1f20d2d4efcb8b788b7db654eec9da1d1. 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/FR9W12336990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef6b95af6b3d87e92d1452045e415c658972558bbc5a82763535a2ef3208277. 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/QZTB32298501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1900b686d7bf3cfe4c4ff1f07faace518d28aacae7e7827029b4cd0e50899453. 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/QZHN72296518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba70c4debcb7e3a4bc47f4443a19e62a5279a9028f9a34d06f27f831464b86e. 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/QZNWX2289997.