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 0xc584ba77ba66d33203ad7546e59cd92efda301abd73c03ec3e2041b89286f977. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd1494c7-4e75-43e7-8fec-a55f5d4e0822.json and https://artists.proofprofile.net/proofs/artist/cd1494c7-4e75-43e7-8fec-a55f5d4e0822.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 0x8dab65dd62b4afeae8289af33fbff92eb5f071a42518ee3690fb2046a95059ae. 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/QZNWV2475635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda8b1d59a816382fd91affffea09f02bcb0365b3478905441670b41ca5deef0. 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/QZTB72338126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5748891505fa1b58c0b6b009887e995e0d2caac7cbc1e1fcce1930f49562840a. 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/QZK6F2394438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b61b6f17c1ba1a61abb29320d08c1f59fff560cf86f27fa38fdd1dd78de2a1. 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/QZHN52368825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255c26044c42440b8c8fd3d671c07e5927013b8323f9ee32d35e3b1f35011ea6. 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/QZRP42350648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255c26044c42440b8c8fd3d671c07e5927013b8323f9ee32d35e3b1f35011ea6. 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/QZRP42350648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b61b6f17c1ba1a61abb29320d08c1f59fff560cf86f27fa38fdd1dd78de2a1. 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/QZHN52368825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc95e0f83873c4f037059ecebc0c8a22e65f1bfcb8d521b93470a9404f9e8eb. 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/QZHN62108054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b533ae42dd7eceb46b0900d21c57fc26c99e17dc780e9801a4151e8cd577df. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ52127985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4804552f42756a165b4a60be784c4839b91410689ad622b322f805775ef15700. 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/QZFZ72052546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2961f87c8fb9bb533df707096f4cf2362f290ae01dc0a43844eefc2cc63fbdf. 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/QZFZ52042660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36775b62899dd19366790b0dd6c295119a24e01c5de40c3695ebcf1fa4230347. 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/QZFZ72052547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34009d4a18a16dc92c4c1082f076b14c38bac946a6501923c7b0ab9adc4f0f9c. 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/QZFZ72052548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd502847a028cb7f3c36d93660cd8226f17087c21462623d159cc65a6feeb07. 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/QZFZ72052549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd59da5934db7909eb036982c342df7dfb6a06c02e6b1f6060473d1d6e40d4a6. 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/QZHNB1939586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2961f87c8fb9bb533df707096f4cf2362f290ae01dc0a43844eefc2cc63fbdf. 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/QZFZ52042660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd59da5934db7909eb036982c342df7dfb6a06c02e6b1f6060473d1d6e40d4a6. 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/QZHNB1939586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c16f9a9a94cbf233e52336fd9334a16ae61b4b1db107f58ba8ee9d0af5f3ff5. 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/QZDA51911206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2d884a1f4e67cba2ae58424bd976eb709896f1bab086a17617239f7323829f. 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/QZB4J1859631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfc443362e43ec76ab8a99e262a4e8ae0bfa795b7d5921b0bf0aaabc7f3ef9e. 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/QZB4J1859633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bdf9e068538f80d1999b497046014d73e2ee7d44fb8c16690b93f7db9edc93. 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/QZB4J1859634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429ccc66dd8c979ab9d65b55f126f5959cb05f233ec1a0c0dabf5ef86818ab61. 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/QZB4J1859635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e897affb8d1f7d2a16c9effe146c915dd0920713c2797fb6dba77c6ddbeac28. 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/QZBRF1883403.