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 0xad672d147f6f769972bb2e32cd759072b0a97b90ce5656e23bc74f3943dc7049. 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/322305a0-17eb-4b11-8369-2b8e22b4d7ce.json and https://artists.proofprofile.net/proofs/artist/322305a0-17eb-4b11-8369-2b8e22b4d7ce.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 0x45d9c641f2605ac02818869b88664377a704b5514bc1c07cba8809901c66063c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR0U91700895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1b028dab0fadfa98ef17f3e6888bd9999516a0d97c0f5cab129c917184df41. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/FR0U91700896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a369107eb7f7d84115b105388960091a9f07fb711f6eb2c2661630de7eb6cf. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR0U91700898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc828aaec24d37bbcfc2968c12173a4e24d2026db18d722cb16acc42bdaa000. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR0U91700899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21419a3e127ced8704ca6016454d2bc4b2c3e30ce745b14ba447f2f9d8a06d57. 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/FR9W11913726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe031b919072ee18968ba0a63dc2406f663c8f1b1ccdd537bf60fd0c197061c8. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:05:08Z), 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/FR9W12003726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a5fda0a65a1783af7e5f60e2c7357099bcd0a4bae4e41ef5b78876c9a8eae9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR9W12005285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8361214c72c91a669c14f570646432a503cb765d6b99efebc109e5c4f48f735. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:27:11Z), 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/FR9W12008424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e30fb816e2713a515adbce7c12533887b70f2ef126ef1b772f777c126125df2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHN72096448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe1a445c87863d49797bdc03c7faaa89271148b98f0bbc7c94aa448f23d2123. 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/FXQ692000141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a42ecc141a26b211fbd753beaa0d3b1d81f5e3c5f3c24387990753457d9af5. 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/FXQ692000226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef5a1817a3ed2f8e47a827f3940b21a3c9437a6f2820762082582b4bc815c8a. 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/FXQ692100158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4e2c8e194a46041c9e1d23af158c09cbe13236b1265f7a4fce7763328aa2ce. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:40:45Z), 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/FXQ692100349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c35d16bca967de744f35c8f363b2e10afb450ac02c145989de79eeb17efcef. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:53:08Z), 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/FXQ692200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9926f5dded695ee149c187caa3311b775362d40368c25119c1006643d13384. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/FXQ692200394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c37f82ef6e154c24b5345cc61f156019f54f123a454c3d1439f2fef08c7d9a. 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/FR9W11913006.