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 0x4647cda28550dfcadf75c0c33c224ccba0bdd4b93280b9d562b6cab00dd7a27c. 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/e069e6b3-8898-4fe2-8a92-6b098be7f6b5.json and https://artists.proofprofile.net/proofs/artist/e069e6b3-8898-4fe2-8a92-6b098be7f6b5.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 0x7e15e5a7a6ab25d9e4901c259dd84614ea49edd22abe386347d5b8fd11855ed5. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:10:45Z), 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/CH6541838044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fba5ff605b92a1371f700172063721e71040abf12c6825f3fc49f4946010962. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TCAGD2229345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3315ead474328958bfa99c4b7ba70a9e7fd5a768f4ab84fed0df5532ad739f2d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAGD2229336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2869ed53833e83f575ed65052088d1af83bd6f1b03c50722e4dc18373cf32710. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:11:11Z), 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/TCAGD2234826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7def255f043a34c500054077b568838cc5fed20bbe92f0da7ef1439becbbb2a7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAGD2252894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9542eb95a769eab2e148da4d1e46f35e11397e8b365a79dfa757324e81b9e057. 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/TCAGE2243217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd92a505fe74364c2c5adb78168e8b171a8af90686db466e030b689caf245bf. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZNMX2261584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59ebe0be61ab0b0b4adb42f596eff95e24da65e1ff175ebf7e270e411e3f41a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZNMX2261592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb10c4b42e83bfc1e690bf465b9c987d340f18bbe807063f6b95be8f8c5a6e5. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZMEV2306966.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7880858c7d18379284e14d031e1a8cdc0de8d158c40592beb1adc48692218478. 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/SE5XG2507139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6d2a1486f4b7b83e043419bd382b9836cde91dab2f890096146326a25e58b7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:48:21Z), 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/SE5XG2507142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc48428c284aa34652e7d5191575e8a749f70081fc32b5c3a90a0bcf67b42a8. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/SE5XG2508279.