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 0xa28e26cca66126630f84914ed4a832fe93f1d86df41320a5dbac0d3fc982ec38. 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/eb2ae423-bf03-4819-b7c1-59e579d4d70a.json and https://artists.proofprofile.net/proofs/artist/eb2ae423-bf03-4819-b7c1-59e579d4d70a.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 0xb1c4085cbcf132207841d043ba0e1a90705bb365c158e23c4cdf83768f7dd7c9. 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/DESJ21700145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286fd3ac8af352529f6bc8fb33046e8e5a88cddc1b8bd265a1744f5545c3c8c1. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DESJ21700147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecab27242c1c5eceae1ba0072c1b4f97196ec00d31be3d4e932463bfb1ea8eca. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/DESJ21700148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6231bffbd1da52333918c467edec096bca05ff070fc61fd7112a123e7753c46a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DESJ21700149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd454754c6c8f24bd1d45b6b76b068fe48373f500017ab3ff5a32e8b870e819dd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DESJ21700150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef10881026552b043994f8c5b9104c150e57c291d8a857acbf00c018e86685d9. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/DESJ21700151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3a0d2b8896dac1985f9bd69dce027ddd0668d13cf1172ee3059fbe58aeae66. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DESJ21700153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42469681f1fb1756a8f56c54ca2c7adb8ff6477b15a0b5c9454b626127294585. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DESJ21700154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0fed478d15271748ec944045a94d3df2015f96a9416340828a09554203c22b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DESJ21700156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d49425e9dc67a2b0ea89bb78d71741b8040b532d09be74e1e7774581bee2f9. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/DESJ21700159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8b02e3961c32c2310dfe15ee5a79156071175d846d20f552cbfd94237f2bb0. 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/DESJ22200135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f1770c73306c6b6700cd099ca5e84a09e601c0c067fa4fa495ad2f0b7d3efe. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/DESJ22200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fcfe08a2ab727e72763a0f60b76740f3e93502bfa0bc71d442c8432da320d1. 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/DESJ22200150.