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 0x6b8a5f17b4c21449bc78d1df6e996c43fb187eda1f85d38a8a8cdd94085225be. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c18c65ce-f8c6-4625-ae03-e9535b2b6cbb.json and https://artists.proofprofile.net/proofs/artist/c18c65ce-f8c6-4625-ae03-e9535b2b6cbb.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 0xcc629a08a29007c0a0652c8c3919aa69442bc2c4f2172f01768965cfc0a79a8c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZES82275253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b2ad71595d1829bef7aaab1c7eb15a2c23a7e705548e39b0b21f8e7961196d. 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/QZES82275254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3240a367ac172e95cf84a7e7360b48bb033f7cb4e36f0692f3071706a1406036. 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/QZFYZ2214870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c298afe7dbf7f5de40ccd9964391f73c7faaf513dd73e5bb4784933e15786c0. 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/QZDA82233363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c570e24f2afa51b8a30e5ff6303bcbb5f12199fc95637faea7abcdd1fb9e795. 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/QZES82275256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f8dbb8871dcf0a37548cc844b02cc81c7556af01299c14ba6adfffa0dc5338. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES82275257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570c176745f71844e245c550852ce59bfcedfe426d3610b7973c4bd5099a6bdc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFE2480762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1377ce3dac53bcd82765b7e9ac4a00022828acd66b4cd32642d4ebce598da2d. 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/QZWFE2480763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b1d9c301210939704abd4b8c5caf77cb91ef503a66df121dbe65d5a50fd1eb. 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/QZTBA2367798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe081f8bf35ebcf726fff2282d2fa60dd24a7c60f2c8d5e25e016f79f2e13bc78. 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/QZHN92358203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2ee9dccbb04e6eb785edfe8627c5502630e69bb4b551d386cd0ab17c9d76af. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA72385094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c298afe7dbf7f5de40ccd9964391f73c7faaf513dd73e5bb4784933e15786c0. 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/QZDA82233363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3240a367ac172e95cf84a7e7360b48bb033f7cb4e36f0692f3071706a1406036. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFYZ2214870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81c64effdb36fd393ece528308c09511a7f5c879deca176d6bb1e8ef7ea3bc6. 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/QZFYX2042282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2570d3c98118fae4904c51f6302f50b16c6f4fe0003ea2815bd871367aa02dc. 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/QZFYX2042283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd905893c2017a56379ab235c18164ae4f830fe9b6cd1e0e0feec0200c4ba52f1. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T20:13:14Z), 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/QZFYX2042284.