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 0x1cc1523fab3748a0ecadcb1d156d530c4aff0bfe7309d6f9fee581668826c2e8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12d61ed2-a804-4824-aa37-8d6cbe338b86.json and https://artists.proofprofile.net/proofs/artist/12d61ed2-a804-4824-aa37-8d6cbe338b86.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 0x08e324b79b674d12063b195722b4b14d583849a78f5a8aaf550d8fb4b85767ec. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZ5AB1802767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217d760d01dfc07514b47174232ac55a57c534c141b28892e22278e35932679d. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:24:26Z), 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/BXPFF1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246dfb3d9f52ec86ca30485ef5961bfb12873ce7f8727be98c253c0f48bf26e3. 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/BX4HM1800003.
Qual foi (Participação especial de L7NNON)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2bfef19dae72ef97c45a15d20d5550d65c29246b7492d5422ebff380636b87. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/BR5TG1900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63606d01e644593e61a0c7c8e0c24dcc14756a0ab9e332c6afd3ac20b74f75f7. 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/BXWMU2000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd466f27a73c8153215407c61c072671ea2d64a587561bab111813154a33c0fa1. 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/BX6842400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83d34ae7bdfd8a775889b5343c2bac9ae2dff5d39c89aa3b3ee58ee9fe94d73. 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/BX6842300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfaf66bcef18e574bf5d64855aea2b5895c8d2a14fa02933f78f0f8c100baf31. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BX6842400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eecd998aa90812f52e9accf442784307012caf24b263045585578f9e487fa56. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BX6842400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebac98ad7b6b724a84c1a20fc3770a46f4274e69aba3d50d7ba76df3e9038ce. 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/BX6842400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7ae7dcf9e866b455f61752b3906028f40673f5813d96dbdf56c23f6582ad25. 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/BRWMB2201087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363080e7dcddb2c7964edeb28df5cbc17cb2389c990e34e5be74efefb3e24c62. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USXQS2230383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff32760819725313c0c7206f0076d592b1d9333330341e542161de0b4cc672f5. 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/BX85Z2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4290c93eaf37c1ca66c31aa044d4008713a8081728047f918401d9ab6a93c35. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXPFY2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf603bd4e037355aa626818abc15cffb5913608ae4491d1286a48a2035c22ef02. 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/BXWMU2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf603bd4e037355aa626818abc15cffb5913608ae4491d1286a48a2035c22ef02. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXWMU2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f34d98bfecdea29165fb7f603f603c6cec3a85b08eb74bfc72a7eaea10bb36. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXWMU2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dba9b7e1a8adaff563d532a89d5767800f76713edc061ed72159b3038b84ff. 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/US7VG1861581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0f35bf6f413068f8813be510a62ef8686633068f489428fa0de687195cbd46. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRND31900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6bd25a42c6833fb7d2cf34f5dae20bd880af429b950e3b89233915db5890cc. 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/BXPOB1900065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4213d35dd757a1238a379f94acbb805a8efd9b37af6647b7029cffec8e1a1b4f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BXTHX1900053.
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 0x98020e646761c9877019059dfc8ecbf8ceeedbc2b81629606c7222a2f519b694. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZW9L2394058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a9cfcd43cb219b9d68dd67bcc902363ebe4b9e46b3a8242ec9b726632dcfb7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BXWMU2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ac0d7b37f7eec2bc3984ebeb7c7e54a1ad57614bf84fd6d5b6925c9d90a0c3. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/BXWMU1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa525fd054fddc45944c7cc633e2c84f17bbbca3440e660bcd07acc8067261692. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BXWMU1800013.