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 0x127536f7ba21c061f393a8531214183de1a289dd28379b877d55c546a410a646. 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/a0d2af7a-ead5-43d8-aee1-865eb54af35f.json and https://artists.proofprofile.net/proofs/artist/a0d2af7a-ead5-43d8-aee1-865eb54af35f.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 0x8da62e780419509effe5c08f30f8c508e017aad6fceae6ccf02492b0d2a2dcc3. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZES92027640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacab089319a88390146b8e448de1aef6620469e4974ffeee87ebe1f1cc2d034d. 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/QZES82077233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0388ccaca3f24477d3c32b9e8877195a7a30724fe4e96e2d550b868a66e59359. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:31:04Z), 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/QZK6Q2583676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177961b9475b1b4278f58c430806d9c23ec92501b4ef8d2c926807c5adff595d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:04:10Z), 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/QZK6Q2583679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91628b6b030604ca93f847de6e1812c53e3a82d4cef8fa325354534db245d949. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZES92028613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91628b6b030604ca93f847de6e1812c53e3a82d4cef8fa325354534db245d949. 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/QZES92028613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bfe495c0524687d2314bcb2594e20f9c195849bbe4ee837c5b7cef4988b5a2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZRP42122872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4c6e3e4160cd3b21d24f6d0bba74748dcd6fff2ce259fd6ad42d9395338184. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZTAT2172206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efec27fe3f2862577895e6c52f7d938d0c25f6d9c003fbefe172324a015be99. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZHNB2549496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af935a9bed9f7efd243f28e8a407ae5d53396a266ecdcae38e8dbbd3aeb9889. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/QZFZ72423366.