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 0x90c5d1a58d5e67ee816fe7fae07b8c398a689cb51394ea66e5992f9dd6b55f5e. 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/0606cc23-e952-427b-8602-6b2cb054d4ea.json and https://artists.proofprofile.net/proofs/artist/0606cc23-e952-427b-8602-6b2cb054d4ea.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 0x7a0c53bd035e2020b6100575a9ff2b449a6424c929365dbb0258ff8452c373c1. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/TCAFA2072845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddea68c2ac687f18c3518132dae1c45814433a9f75d89ff20a48301ee16eae3. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/TCAFA2072876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c148a0137ebf6e49a8730b0a077b4a4619d3f868967d12e286b24440b96a9e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFA2072890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7966f542b0df62f17f0a35013e5ffd71d4c2827713b24a982c5afb223836c37. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCAFD2010335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d45bd020f6313cb305c0ddc3e3a7d3d53f7d2d91c8b9243265244a7602f1f75. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TCAFD2010339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331da31ed4c88de96df059702a69992764b19618f6c42363fbb050dc018f7096. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/TCAFD2010344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e73dc9bab865585c221d6ba70e73283f2a13fb0a76b09015e6b13235a82e1dd. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GX3Q92308543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b017bf0bea3519cf294dbaff6a12e466c81aca8c3ec12914a9b74a4b603436a. 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/GX3Q92308546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0a39f5e2c3bbc6d896c081cf14ae461b94fb888d803c3e62548450dd1ba8a9. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GX3Q92308544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3aa8968a3a4ddbf77d79df378b2388387f4a7a2d26bb7dce76a49835827a9f. 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/GX3Q92308542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2a21473f9e83d87b8d44b1a7c31e2607cdc028434d1c693e94ba3125c3c95f. 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/GX3Q92308545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ef39a9ba3127d953bf9ca8e2b958570404b593215aa755441f70f54e10ba5b. 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/GX3Q92308547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3196a47afc7c4e7c9cbb22ce5d7b08b8da22a34f3abc7ca92d966f316316b86. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX3Q92308549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5f10ca5611783dc42977937d9e997f5fb86552116b5e4f689a154c92fbddc9. 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/GX3Q92308548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2347249710e953e0d0f9557a5792d6d7c018157164d5c8f35e24ca5371831d. 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/GX3Q92308551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe344a7995e5c7e7053dc483da12bdc43953c49d3be8f986d1d5e8c540b47ff. 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/GX3Q92308552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bd87bacaec3707dd1dbe770b168e8f9cb53ef4a0889156792198eee7eb11d1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX3Q92308553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870b0796ddc7d97222d6ec973b4f9e02398cdee8907803a126e372e8df5be382. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GX3Q92308554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d1c6a3631785fb9dc2ec02651ade33119a31f30e0f86b6d6140c39ffd3219b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX3Q92308555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612b25e6873a8af8671b874325c5d3e4c4cba9d4c29337927c7986a5647038f6. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GX3Q92308556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d97656445f57830fbec30b29b582d4952b1bdb651383c47308bf7a3710bedd. 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/GX3Q92308557.