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 0x941e42abd370cacceb0cf9bbe54882412c814c765edf6dc83aa800d172a9f26d. 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/c2967035-acf5-4847-b562-b8fe496fe77c.json and https://artists.proofprofile.net/proofs/artist/c2967035-acf5-4847-b562-b8fe496fe77c.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 0x1721a6a96a96f99012a16e8593fe4d220d69d3f12f781b3a9a555b4f345ef836. 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/TCADD1733004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fc15868340e4b49a95f25af4ba95d184291fb908840751c97915aa0bb9058d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:50:57Z), 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/TCADD1733011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd0ca2214586f57a9d993e621d6ad4acd73659344c28c43f2e6f6580995db72. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/TCADD1733014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48252963540b124eb25d2853fa59fee459d5c63c58228aefcc095e65fbb6fec0. 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/TCADD1733016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd888c501b8c6144b3d3f380ad023382ce5ce23ecf046dc6f0620b93af93fd3a4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCADD1733017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef31ce67763ae353cb115f2bfb1b31d565e6a7e98f0d2deaaf9c94bffe1e469b. 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/TCADD1733018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a401e53d1f8a24f2ee602d7a8f99ee97354f61ff3f0717267a440dc235f3e62. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:06:25Z), 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/TCADD1733020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5325bfd9213be955e9bf147d92b2d8f392ad7245ec64ad9dcaa6ef693cc38817. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:37:19Z), 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/TCADD1732046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f15412294d0239db290b65659372c2b18acd4997739667fef9714d3baae4ee. Chain 2 (Bitcoin): anchored in block 957629 (2026-07-11T23:44:46Z), 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/TCADD1732538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41071180199bada1ed6b53dcec38fc72110ecd3d477c92ad5c005fba882e2b14. 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/TCADD1732540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ac6f9735c1316c50617f36e0fd474a6aa191193b87fdc35f76add169a5da2d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:30:59Z), 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/TCADD1732542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e40da97e0140396e7b9b4e5f9f28ebdedfdfaf8fa9c07753d0b98c83cffe13. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:32Z), 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/TCADD1732544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4e9370bd943463f7fd31c60999c8b5d41f005e1e6767d0433f30f62b8c33a3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCADD1732550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07f5544cccc43c241dc44aeb01466b2d34fce67577530e91b11d2b6df252dea. 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/TCADD1733130.
Hashkifa (Look Down from Your Holy Place)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a77140d859b6e88bd009592d0d45b8e7699754fa06886bed9ca846188c10e4d. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/TCADD1733138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45944eef5c0a2fd49b25b2d2a4f1fea7154c62514d6cd4a20d443fa824aed26. 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/US25L0500342.