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 0xbb5a76f81c30d863e2b0a81d601c77b5af49622e1662226bab1501e338ea73b8. 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/3d50dd6f-d264-43ef-80c4-00e709a3d6e6.json and https://artists.proofprofile.net/proofs/artist/3d50dd6f-d264-43ef-80c4-00e709a3d6e6.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 0xa103cfdbfd14387c9f6f9e971aa281e535213e4eee1896962f40e9a2413e3280. 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/ZAC031100270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88131f45d9a8d2ff726dbe73b9013f50afadd2fb39bd9361a4d76871c349db87. 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/ZAC031100274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ecb9fc296d2c3eef7416a0589c2dad95ba9dbbacefa1601329cf3ff384e3cc. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ZAC031100276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3567f7b58de4d96a9128b250c527ef767f2405ec2db340db3a05ee89a6b0db. 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/ZAC031100279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a29b9b7f24f1eafee16c4accf42aa36d33cc2d400635c54fb2d6e979b02482a. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ZAC031200233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381cf6351af906630767ec4f28a4cf8e1201cf1272eea1069fd6e4600f19e5d2. Chain 2 (Bitcoin): anchored in block 957622 (2026-07-11T22:55:42Z), 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/ZAC031200235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f56e6beede839ae64046097322a62cca7f2d87bb1abd1c7f0e1f46a5970df12. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ZAC031200237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bb73927ea3a39e6c211882ef2451e8c4542a4179ce375667572671c77306be. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ZAC031200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2dbba659a0b077f6a4f8f65ca8257897744f5991dd40ed9cd93b1cd7863cd9. 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/ZAC031200241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb901546a57af191627869a396d1f60a9a81562008347da62434f304cc7e0379c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ZAC031300383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa963de5368a13aeec1e9b07edf881bd9f51db67b44ee6c84462f0add7c665ef5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ZAC031300384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d17d265c2857eb25f12b47bddc26837777e8722eb9e390b2c9cbd3ce73fd1a3. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:14:47Z), 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/ZAC031300388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2ac1b4386e2b5d958d233e1d00ac6bd348cb395394a08adc6f482dbf550db8. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/ZAC031300389.