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 0x0e530641292364140cca13fe66327bf665d656e3e551924ab001132a93229596. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/171447c2-6a77-464a-8155-4aaa340c5c65.json and https://artists.proofprofile.net/proofs/artist/171447c2-6a77-464a-8155-4aaa340c5c65.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 0xb43ba4c2e1b22651c80b7565bd6ef75add6fd2530ef85b288c1ebc224e189f28. 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/CH7812534171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6558328f541d454970eadb07c2d3051426f3ec0c1b81302eab0fcded7647f0a8. 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/CH7812534172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf704f3e0a76b1d5d6d46b389c0a30e7dec97f71fff795c32f1e055dc1c056698. 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/CH7812534173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811d2656426c0c769f953aadca54d360ef34487cde7619644e2837784d8c5c25. 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/CH7812534174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5af30d8145a75fde328be2448b3e92049d0645a1fdd7cbb64e7a9156c7f31d. 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/CH7812534175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd792dee52ef7f16caa9634417128bd4da88d437b9c83b3341ea4cff8094f19cf. 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/CH7812534814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc6cfb6c0af937fc2132ab6803e558d15f314dd1bf981d63a25c992e347a028. 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/CH7812534815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fc484cfa9d01816eaf88f13aa17e4026d93e41472c9be91c74def118d7ee82. 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/CH7812534816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33028e8384d3f601452ac24ec9acfb9fe5ca1f07db2412a479bb8b6103f24bfc. 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/CH7812534817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd792dee52ef7f16caa9634417128bd4da88d437b9c83b3341ea4cff8094f19cf. 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/CH7812534814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeabfa125992dcc72a578193dc57d52f7c9be7c6e9ad1ceaadec4e0f578597f9. 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/CH7812535324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b5aa09d6ebc0c3247beac119ed39acb5fa60c550dbc091f5ea4e3c04ffc8ef. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH7812535325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84a28d4f7bf25f13ce1beceff263e1a95b6bfb69c9df59a1e057221f46f8b3a. 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/CH7812535326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3743829be931b1171a310068cd67239225b4607aee8c76c11df1dd37dbf2b4f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CH7812535327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bec8914cb04ce068ca6b964d9ea35adca982608cf90e8fd336ab40e41776c5. 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/CH7812535328.