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 0x0c9515fbf5b85df4db03822287f7ef21168c3c8f704b5ed0a10af16cdfd125f3. 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/f003610b-121a-4036-95ca-f641f2fc19da.json and https://artists.proofprofile.net/proofs/artist/f003610b-121a-4036-95ca-f641f2fc19da.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 0x81dcd8211b879ea47e8f2a83595d305611f7586d43411e5ad553fb92f645ef2d. 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/QZK6F2093040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc5272d98c02bc0bf279eb2e84458f23b7777e0107488d5e8d9f45594c96bdc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZA46M2206001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141853b954ddc2127533205b800f75d25bf1339d960a6a19bda721307b49cc86. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZAY362200768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa03dc655bf015e7ac72e39d86074f1b267d444031f84b12ff314ddb44f698e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZAY362300881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa03dc655bf015e7ac72e39d86074f1b267d444031f84b12ff314ddb44f698e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZAY362300881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6029de11c503bcea353ef6b3ed9136d6313e9d59c882e317764c284deab4a2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZAY362300906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a09db6dde442d355725ae213721616dcf285bb6b5c18288e61a4aa82bbc607. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZAAKN2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ace4aba2f5592b4d62b5f35f08dda2f2603f7f549f506518bc420ac4feccc03. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZAAKN2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f1fec0927b3b64291996eaeb16ea52b80f78443d0cdaefddd7fa377b5bfab6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZBLZK2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd587cd53451f52294662baaa051da7092247966ae41a88b59bec88f19ec2a007. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US23A1590222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76f3d6b98d798cf562210c3b54765ec62dc342b2b422bf71e83f660b6ae3598. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZB9WN2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd587cd53451f52294662baaa051da7092247966ae41a88b59bec88f19ec2a007. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US23A1590222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1b711e2fc54b549ee63ef2d8ec326abbaa1f396c7663e221a1d22576503aed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZAT122300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6066ccf29190cf6ee4d41b6ae4ba60384c00eff0e66c3cef0a6c02f3dc3473. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZAY362200821.