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 0xa159beec308571b7f2474257aabdadf8713bdcad0dc28fff6cf806d79d0eb813. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29ff0d4d-8904-4f12-bf4b-ca2ec1fc08de.json and https://artists.proofprofile.net/proofs/artist/29ff0d4d-8904-4f12-bf4b-ca2ec1fc08de.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 0x0a088c92a7d7238999e6afcbf0f54674778b17d862e2e50e5058293ff53a01e2. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/BRUM71501263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e11d217ab1c25358b23770e4700c6c89570d604a44d6e7500d008769b2b806. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/BRUM71600935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fe1af31100e0b4cf74eb0b4b4428716ab1ec457dc8c85fa947f7f7c2c64389. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/BRUM71700001.
Ao Vivo - EP (Ao Vivo Em São Paulo / 2017)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6929b9cc0bbf835ff2a911ba7aa433de53f15f125ab235b90512b8057a4db91e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BRUM71702639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091e0f166cb5cfa0baf97cf1270df21ec309d3eab06022c9a6c943d49835b45a. 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/BRUM71702638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6929b9cc0bbf835ff2a911ba7aa433de53f15f125ab235b90512b8057a4db91e. 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/BRUM71702639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0e8bbdb9afaf4f20042213bad18d9c19bb0bdcebb3e3519c7b54537545c515. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZ5AB2305245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eeecb5b66c55cd91b0ad978c65bbf47d89b0b6e61406b4fbbcbc12308e2af2a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZNJZ2404101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb84a723e0df60c03b294fe87d6b350c758accb366d96c41226da6af7e356c30. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZGLM2570145.
Mama Don't Let Your Babies Grow up to Be Cowboys
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87dbeab0212431e694c749e659cf7b44e59c3ea9f5f5073de7fec38b7f1a10b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZGLM2560047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87da381c8ca9fa6f9962e96fa3f9dc5587be7e61f262eac384558a4628925dec. 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/QZMZ92500423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4c06072030366db95ba1c7767eaad01a2f49e83d5c39d2aaac674b61c4d6f7. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZMZ92563575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a088c92a7d7238999e6afcbf0f54674778b17d862e2e50e5058293ff53a01e2. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BRUM71501263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e11d217ab1c25358b23770e4700c6c89570d604a44d6e7500d008769b2b806. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/BRUM71600935.