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 0x51eb1e987ca5814a777484d2b35771c512f7d39d8222d6408e327b724d52b785. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91b42a77-507c-40ec-91be-801e732bb6e4.json and https://artists.proofprofile.net/proofs/artist/91b42a77-507c-40ec-91be-801e732bb6e4.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 0xa0bd867bc867548172efcfd931e5260db9878e0915f8543afbd77bdcb191c0ce. 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/GBKQU2391440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf7e18ed63d88ee63fe093b3885e723da067e13fa7c4c08ce05aa2478d98ede. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2391441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e5c5379c09a4ca05d2580bc328f570b11c879c6ce423fa1612f1cda58c18bf. 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/US83Z2482790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1862b2e4779e88d3f8f8134f4f0d063bfa213f7ca1629aa686eedfe6ae3758a5. 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/US83Z2468467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1862b2e4779e88d3f8f8134f4f0d063bfa213f7ca1629aa686eedfe6ae3758a5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US83Z2468467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bba14eb2fc1b676297f7dfceaf623e8a06481e6944e18a043a5c39e32eaa58. 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/US83Z2468468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd471255e0496a9871a8e2bc1f1f3e3ba3edb75096db75298a1c667a6ade645. 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/US83Z2464027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff348bd9c644522b97e0b82640fc79f676f4995e98b0f9fca4dab400439150a. 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/US83Z2458388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5c95a2922b64cde09d10dd73c7c2bd5342d203e9a340c4b2bbd8e227f8d703. 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/US83Z2336170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda8c016ca3e3623d9e55bd3536b78f2bc809b2f7f64b476eb1862ca9386c807. 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/US83Z2328549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a45a6b2fdcf4bfc01b34ec41efa51abfcd2b97b8a3cdd1ec474903cc5a246c. 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/US83Z2315919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcd881f503a70d65ea581352afd697ac9240b3351bdabf80a3a0efe6420b9b4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US83Z2305978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6b5f61a72470125ea0ddb39cc582554ef44ce1e88fc4814d5a560ae13b2c91. 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/US83Z2304045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0799fee8b3d8046757bdf87be4a05fc4d348d3533ef9ee44aa1eadd0020d1b. 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/FR85U2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7382fb30b6f16b560e7733f2b4ab7f2ddabe65c9075f55d8e842221e3ea0cf. 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/GBKQU2360302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9758246cc164fc8014330db50c1d567f2432c003f64b2b598921f5d7857516. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:29:40Z), 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/US83Z2311043.