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 0x51d8da180e2e1722cb597edbcf5e97e04800f2c92d50e8c2e5b28c32077aa6b5. 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/be74e42f-6b18-4766-9aa6-21526cc9a38f.json and https://artists.proofprofile.net/proofs/artist/be74e42f-6b18-4766-9aa6-21526cc9a38f.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 0x102570625c61b5a441519236266c124bb5e2be1d0752c1fc479e5f85f126716c. 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/TWCC31903014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a95af77b3df3603674ee73d80ed94ee22062b9d75da1233d73ac15846e05a68. 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/TWCC32000943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6324f4c25c233b9166013ad9afda6dbbfce78a583d7a1d137bfbcbf51848f361. 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/TWCC32002160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6ded0d47dc9bc80a6d00685656563c21ce2960340a5f0d35fea480d1e28434. 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/TWU712304846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47a5b460a2df847bcadd338c5ba623063dd06d6c024348a9cfd6e8791043fd3. 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/TWU712500685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cf75e91da04afc7335415d81aa866b77e9d3637e4f7974497cfa9ae2c48130. 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/TWU712500687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d17cf41f0cad3a4d3a0ed33ee73532120c264182846fe1ff332c9e1ec02e18b. 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/TWU712500653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1303c1611344a2338ad0c14e703cb8c5a3cf11b552a73a5b93a9011e5cdca7a. 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/TWU712500686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42af02d2e2ebf78edcdf7cc92916beb94b5f2bd830d7c58a3e69e3ac26ae0713. 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/TWU712500688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb85535fd3bbfc5b30512173715ed55c7f3594809ae2666dc803ae4572a2892c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TWU712304304.
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 0xe817e5ae04cd294998748622b9f5b89ce7df208ebfd7b8f52b4404b00d2bdf76. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:38:42Z), 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/TWU712500689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f887feaa18602f7b8ee05b07d1b3a806a61032944402baae41f79999d61d15. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TWU712500683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c53f2fc612716a850d0dc7c4d4ee916a7406d08ec8074717c922b7667fda7de. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/TWU712304847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c87820e9d0d6882adc1451b07b015db30cbc1c4fbe69d062b30be59179ef39. 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/DGA052014975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8302e49ebd20b3dea9e2acdd99d2708a8c16ed4d1c41c6d8545269d74e68b646. 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/TWCC32004102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645294ee8bfaceac8d22ad6e6f9e5031a67698f23d7aacd4983c3a58606a9d88. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZMEP2042999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280a38b12a1d2099e37d0bb59c979522ae9e50ce99381d75fb74f7aaabe82151. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/TWHG32300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00eea01cde8738dae70ce29c1f9f3257151c655635ec3a8a740ec38885f81098. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TWEG12300019.