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 0xe10d2d5616093cc15ec8ce99872101a577bba727927ec23793d2dc01eb9b54dc. 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/862b8bdf-135c-4df7-8f17-d4ce7c9310fe.json and https://artists.proofprofile.net/proofs/artist/862b8bdf-135c-4df7-8f17-d4ce7c9310fe.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 0x46e99532ecab610ba0448cb5fec91882bd1ff42bdbb51867b6d1365aba2f4356. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBWUL2381422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c1371ab97fbe8a02a9b343bb8c5e2b5e8d860bc621f5ab6b8fe1c0f9aaac1d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBWUL2381438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589361ac7684a1ba8c99c6ad1ff4db76ddea74e68efa3b3cb63ce55d403fb134. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:33:43Z), 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/GBWUL2400679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7cd541f30b4c1a324be4ad24b33d39f033f0cf086f471a5475e339fe05fbbe. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZWDE2445881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744e8d52a7fd49192b079ad4f2a8995f5e107d149b593a75ffb3e25c64197372. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZWDE2446105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1b7f643a313f53247960f926f16702211cbceb90733193b526abeb623bbf0a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWDE2446172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b7e130e5bbf3e0eaf584615ebba1d0074d61caed08948b43d1c459a5b2cae0. 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/QZWDE2446202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1997083832eefc135b48e24f36cb31c209e191c7c0821aac006375fad8750041. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZWDE2446220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7590ed734b9cdb8a5031b3a057128cf877e155434282789fb57b8f011cab85. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZWDE2446226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7cd541f30b4c1a324be4ad24b33d39f033f0cf086f471a5475e339fe05fbbe. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:38:55Z), 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/QZWDE2445881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744e8d52a7fd49192b079ad4f2a8995f5e107d149b593a75ffb3e25c64197372. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:44:20Z), 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/QZWDE2446105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1b7f643a313f53247960f926f16702211cbceb90733193b526abeb623bbf0a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWDE2446172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b7e130e5bbf3e0eaf584615ebba1d0074d61caed08948b43d1c459a5b2cae0. 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/QZWDE2446202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1997083832eefc135b48e24f36cb31c209e191c7c0821aac006375fad8750041. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWDE2446220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7590ed734b9cdb8a5031b3a057128cf877e155434282789fb57b8f011cab85. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZWDE2446226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8530feb721fba7c189ebd0097b6dc4fd6b5590b68ff8f046501c242e79495e9f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:31:55Z), 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/QZWDE2446227.