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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 0xecd8e607026ce50fb281dd05a20ecb9745ca1296557f19944cda837962ea4dc2. 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/05a28ba3-5592-4eb7-a865-b7b3181c579e.json and https://artists.proofprofile.net/proofs/artist/05a28ba3-5592-4eb7-a865-b7b3181c579e.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 0xf0c57bc2dbb5026cc0efc700f123e8d4a091a002a6a0755e004a4a403d8c91ab. 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/BEZ351200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f01c25f19fe2a5ef3a875ab89147dc4219d310e4e081fbf1b53e470b23b06b3. 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/GBGLW1500159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185bc1d81e14744687fd8886d5679d25016ae6873ec2debe90c702a693a2ea7e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBGLW1500204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe594645a63df9119d32db7e3a7b14fe1096ae2720a88a4ab7283d76a5d6e21c. 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/GBGLW1500206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa878256f6f96ed5a190a01d08497e2f27ad5e970ba3b3e0ff6cd42f575e33518. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/GBENL1902586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b03ebd9fd146ac96f5446bdd6c625753990e180714cfd0ad48d7e03e1ca407. 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/GBENL1902587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8eb8b6a533b95437c4a1cee1e71bf91fe5e99069cd3bf79949b33b2523a30ec. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBENL1902588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc934f2014c48324a99f1f64364b888f62437537aa08ba4d097fb6b6091ab266. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US38Y2037602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6909b41229f7101dc20b8d9e5260b39b56e53f66b7205fd9c850a8780ee1cc. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/US38Y2037601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11899f3438d3dedb1d14803c3209ef59f85ac04c4c117463d8fb171848cc15c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/US38Y2037604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68f2b90cdfaa4f3f88118c2f111ed0b580c89a4acf15eafd812e8245e9e5e4a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/US2J72302904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6242aadac2ef181b03945b82c2c2a88e3cc7ddedec28abdd5776f28b2a1ac9cc. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/US2J72302905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da1778d2a8757a03f0bae8309f560dfe8494cfc57b211b85b3a33c32d0625e4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US2J72302906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5532d6b01b1efdc27f52227028be1c503d54019c55b6647c3df11bae575de1b6. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/US2J72302908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cc4a9ee36b17475d23a28fee4c1832d903162f2f3d8eb6ba47fc07eb76ce07. 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/US2J72302909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab64b3df507115dc831f863810a543a465348621332e182a684544303e68d8fd. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/US2J72302910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1353536758ad9afd3635533490cd4bcacf2d8d4670a20e5c04117c200140d9f3. 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/US2J72302911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ebbc39704b754f6908db0711f170b6888c1f478fd16ea7ae9d5703ee152073. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/US2J72302912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01dd2e70eef585a1fe0a564d232b13e67cfd162525385c18b6efef6c7b80bea0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NOOLS1401082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e31557f4ba37791031a8e3b84349c899d69a309971f9cc36767744c0501186. 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/FRS711700490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e33c3219b85f49330209e5fc30e8d86b41b80e6d7c2cec94f082f10cbcab07. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FR0NT2000502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bfceca8b7b09576503ece7a20387aa23c3228b660472dc87e889707006bdf7. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DECY61200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d21614e27690c029621dafc80299a995f584720239015c596142bbe77ac80c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBEQT2100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24474eff8a0fb7a17bfb68784077bc2ca8eb3cd5b76f0cc73ca90cfe0efbc80. 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/GBGLW1700175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7f8385e3b0b7b1e7d1c2c43f5473af45873ee069fd3bbd7f1be73052f9103d. 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/GBENL1902466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cb211ff10d19d4f0589f417821a1ff4022589dcccbb06f1c047b07d00352e0. 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/US2J71905304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f84fccfc85a72b7b2b214ba105dd6bbe5879a7c892fd8438e15d4e13eedf3c5. 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/GBTZZ2200034.