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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6aa4842f877ff714fd4a7224ef930dce2aefe5866e51417787660f33e5d42cb. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c44320f-16b1-4acd-9429-e201aad61b8b.json and https://artists.proofprofile.net/proofs/artist/0c44320f-16b1-4acd-9429-e201aad61b8b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28676bc740568f7698a5ced4bd553fe22a8917358f7afdeb654bc87c8dedfd3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NGB5S2500406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea2dd3f70fcd7dc0913224dc53f5f366d2a2f96a28a3901c9341e2bfa0efb49. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NGB5S2500407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71bb302a7510d9d8894b559c7c2e38f108096ad221839615c7bd00510b74186. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NGB5S2500408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9417e27aca39f145ff06a81cd7d731ad64be275b6fb0b03f4c5d014fd87cb6. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/NGB5S2500409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30e3b9ed130d0a0f1eb6bdc36d57a8373fcf985bad2279258bff0eee71cbe28. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/NGB5S2500410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e5097c18427bdae0cbdf56032056a2c30dcb1466cbe3bb61b5e9972a36e286. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NGB5S2500411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedd95ea2d215641bc6cb8c9901bffaa17f015a264fc2e8b4173e5fb83092c02. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NGB5S2500412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc216180dc7b288469e45fb1e6277a023308f63b5e6d4874748440671eb3bce. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NGB5S2500413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee4cbd060da5cfe196e8943826e2b9925a9bbb59d3cd8513148cc411f79303c. 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/NGB5S2500414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f99cff2567b397eff289d6b886f9a9ce9c424166568fe6355ba97be54c7bb50. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NGB5S2500415.