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 0x53adcdbcbd43624e6c7ce0aba7e19d548c6a3afa093e20466929b7f7e5c98e67. 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/44a54621-d055-4122-a735-dd44a4dbb18e.json and https://artists.proofprofile.net/proofs/artist/44a54621-d055-4122-a735-dd44a4dbb18e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Seleção Arrocha Gospel 2022, Vol. 02 (Cover)
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 0xe194b47aa104de5402e190b6bdede55f3d5a7fc3caf70e28806d413e70159b6e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHZ32270788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4895d3611307f8b6cdd8a323296fd93fc9574b21a222da52bfa8038a3d9c66. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZHZ32270789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe960adfc8f95233ebcda21699024191eff40d730874a179878ed2a24e578421f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHZ32270790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790f467bfe9af2a6ebcc14fc0c014c0043f33ac6a9b0017315b8d907b22f33e0. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZHZ32270791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb520c72707137ee824bc7758f5488971405ba85365bd56b95ce970fafe58b4d9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZHZ32270794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d6482ac6b5aa593cdb71f2efbb37e18746a462b752ba5ad7defbcd78120be0. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZHZ32270795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9234774bba93a3a1e5775c3d052d79ba1574065b074f1983676aba5b4db4dcf. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHZ32270796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558418dc6af676c1afb30cfc5a90afb2e6cdc6ca6796892a5331ca66ddbfd3f8. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZHZ32270797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065f363a9b753c6b05ab33ebadd3ed2537332bcb3993586c0eca33fdd4e6dd7b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZ5AB2182972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc0e29f97bc55c6dc711ef02ee42d13e5722799ddc0ba54e060a11b0f7d5e2b. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZHZ42142977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf9c546eaa8b164bf5252a5ccf0995cb6f3739d620df9cf55cf47ae8d248c63. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZHZ42142979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0f0b3cdef403d2fb9154fd716dacec5c95575e9f7344663939d591534bc39d. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QMBZ92368469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26569c1294ae1656e41d75f7f7261d17432dc05244e102dcd415d99fcdc7f472. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QMBZ92368474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33585cf4b545d46a08fe390e157dc34d18d89b7cc57d13b621a04c8263c8f469. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMBZ92368477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d0c64bb74114eae0045e07dcc326cbf840850c5f052a1e9d04d7d5ebd4921f. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QMBZ92368478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228c595211412b6b57026b49efe890a3eea6e908b86294c5ffef93a66246e696. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QMBZ92368479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6688a6f5844a1ea0b956c1765e519a5efbe0bfb61bc7612ba6b2be3d557ed047. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QMBZ92368493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9821ba262026419182986a1d2f05fd3e245306d74dce807da5cf7c3baf6fc39c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QMBZ92368494.