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 0x8c6e9c78ad6eab702f2a01fcda36a74074388a3ba19d89431f54e9b099e3cc5d. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9216839b-1358-45f8-bb97-36cbdd5e18d8.json and https://artists.proofprofile.net/proofs/artist/9216839b-1358-45f8-bb97-36cbdd5e18d8.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 0x03ffb42b2982f1e393112c4c2998ce2bf601944eb51fe91503dbf9c095457252. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTAT2315974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde19bc421c9082523506aff59bc84f2e831b525e98ae9d5ce7fa8d8769216e74. 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/QZMEQ2549134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f6e1cb6c69307e7052e7646bd535116530c68b017741c22cbd271e62d2956e. 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/QZMEQ2549124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9d7734509f29c63b9b5afd7fe28c2d12a098e8b2da1941e554531844dc3838. 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/QZMEQ2547717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd964267c4c5e6e3ce2d4c43d92a3e29e4f3296fd63e650631bb22be0b934e9. 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/QZMEQ2549147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10e2b87bfc80ce739ed14653ed4928341c4ca89c0239af0ccb212d5a29dc40f. 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/QZMEQ2549130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fc9a81e8a7cc959acd54f8510b495f8f37a6aa1687a621553136a6c26e8144. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMEQ2549152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6e4bf1efbb61904019930aac4abf3831de46d4c8171ed550964ff7d2ffeeac. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMEQ2549131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f286e6f291ff0106fae39a8d04a7080885f57880c1e428e7a060d48e1bb7fde. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMEQ2549153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172b8faf1661206546abe2c537416fa0b024ea351770a5c79596f5b4795cf39b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMEQ2549125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af389512dac5a9a36b43c24cfa901de9a4cca547c665fe9d6d3da078222580b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMEQ2549145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049f5fb7ed27e902687d5313cf446d0d79fcd0ff8cbcef5f684336ee4a72bc01. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMEQ2564399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa2fd0c78a80e5d64cdfc8e9ffd3480f73c975e6d6067462a5e3280ae8bb3d6. 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/QZMEQ2564425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211e620f7712cbb4ba6c17345f025bba9bf08acafea7085f0e8cf7dace8f46dd. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMEQ2564383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f1dbb977947642556b5d3b4f698c02b52306af914e60f12f83aee808b964ba. 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/QZMEQ2564424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637512b229ce7a6bca27955b8157421d57a6b08750b4702d9fd067bee8a088bd. 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/QZMEQ2564422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd246823b8b4e3f22871807b2c40d54014814d81016d4528dc1eb7771740e8f9f. 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/QZMEQ2564423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f552809dbb397017b1fb1a4d2568459f02a87ecae4fdd56672d586b445992dc. 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/QZMEQ2562115.