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 0x8767f0276b9c632d4638bc1d97a5212ebdd10d1aca001a107280d8d62263beab. 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/4a148595-8a6d-4b32-bce6-b875d7afbc77.json and https://artists.proofprofile.net/proofs/artist/4a148595-8a6d-4b32-bce6-b875d7afbc77.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 0xf2649472f7cd47505475024a9bf1579ea915ae23bb0223b9992a783f476cf20a. 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/QZMWW2396002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e06043f27a5469b5eaf9ce4198052fa64d113137c737df5c325693cbc88c3c8. 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/BXG6R2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b9b7a4978449da390bb32b21545cb05242a9d07e092d1df7c59d7bd3111549. 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/QZNMY2242340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc9992b91b850c332ac7ae6de87171fbf2d179453e497c924fb5340e4b4d800. 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/QZNMY2242341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67efeaedd3c8fbeaaa2e339e1f99b2428bb4af84867192946938226e4dd578a0. 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/QZNMY2242342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62422c3571b5882a91beeeb15bae412110699abf9217d7861560bb1595bf5cf. 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/QZNMY2242343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923228651031d99890b3e62d6c3eb70562f5799e13ac21770388abcc17d6d4bc. 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/QZNMY2242344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876cd3fc47a33f46e55728806b22005e0d2be84a4e2222f48da6cfb4547fc1db. 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/QZNMY2242345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0354bd0dcdd111c10fa2eb9ffffc28e86c43c17d31004793d67219d3f89161a2. 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/QZNMY2242346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1136800c2c6db5ec49227bda0b02e8680b932f20669f388f0426f2edb62332. 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/QZNMX2254739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6e7588b52360851192d4e85a2fdb293c1a280a046f59cf3d0efa32357def1b. 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/QZNMY2242347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf38de2448c923e11f3f6de8fe4efe561ac85e46bbd298c0127ada4cc50aa00. 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/QZNMY2242348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571425fa719a096105f5114e57d2ce848cfbc164b1a64facf5acdcb82909a292. 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/QZNMY2242349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3243344feba413fde2e56145cb95c6ecb445149946220033302001bf061c01d. 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/QZNMY2242350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859d232f46c15198d10b1a9db886dcbc35c9f5240a16f7a1929ce7884716a809. 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/QZNMY2242351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ba2c578309a35ca55dadfc73bd4e90cdf6f8ac753454fb0fd048526535ed43. 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/QZNMY2242352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3c16217a3df0526927cb07614accdbb4818817169da4dc7e6a6e23465e81cd. 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/QZNMY2242353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ce8ab1fb60c1c8332b60e75525a52e460f1d949d6055a025fbe2e30d0ec000. 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/QZNMU2230932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f41192bb6f65c8002ca63514b7f3f3e2c99828ab5cb01a2544d62d0353ae2d. 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/BCM9A2300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8625597da47aa7be3f157e72b07dcdbc9d7d718c2b6d309e1cdc39711f123e3d. 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/BRRGE2400908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812a84623d3e78696d9c561f537e062c4e0cb760355713cc846298ee0ddabe8c. 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/BRSME2401096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb657a1aebb240d4014ac8f09d007c9b07d0625bd9e47a6ed72a1861a6407e629. 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/BC2TS2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ab2cc432233cb18b31f9b5adac157373713a149e77cea619ce9056ee827816. 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/BX85Z2200008.