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 0x27c794919432c27e9860c452f53e15f6deed7c72e6e970da4d308186e823248c. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/849d8c5a-48bb-4f43-9eea-b820c9ae364f.json and https://artists.proofprofile.net/proofs/artist/849d8c5a-48bb-4f43-9eea-b820c9ae364f.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 0xd772bc023f8b1ea26ce9e06eeada74ac3586b70e79abf6f2755afb11add9cfc7. 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/QZTBF2338988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0befb88ccf226c28cf5ac77d746efab95ee81cc3bf6fd7a2a129ccbc6c4223e1. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZTBF2338989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99909ca1441cf1f3f3aab58af492e951638ad32cf7392e1b0af23239da30630. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:35:22Z), 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/QZTBF2338990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5678d7e187f587cd7747e4639a0387b31057bf2b6e5a5af464ec275a2d89783b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTBF2338991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8145b330e77fc47ef8faa824f0e7d3a20218b30523b0a581179e9272294b5b. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZTBF2338992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a891883130ea5900da4780210f67f32719aa2a2284db94ba6cfcb32780e223. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTBF2338993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd5be2435e03a18461de242ee70091282d6b03967db35ceb2672f437447955b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZTBF2338994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa169a4d41d59286e96ff95ede0e5a0cccd00da77636c1abb0a4972d2d817ae09. 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/QZTBF2338995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f947021e75311bf8e7a90404379722cec85978419da006a7a1725382127411. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:58:09Z), 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/QZTBF2338996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3fbbcd0ad1cdf25f653d5b72a55ac5ed8cc0bd5db9374882b33139ad8530fc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTBF2338998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec8a5f911b25fe57a5aa29c4f1f19485a6415b6315a5e9b75b6c9c7fe5961e4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTBF2338999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ae4cc5cb4feefbc283ecaa3f6a22e67835d136d94b711cfd0a0cc60fd0a111. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTBF2339000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5136314908346b176138663511f17550622c35db07ca3fa03463be4633bbae35. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTBF2339001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bed77643e4b3335a56a43d54fbdd35a07837ed80adde2866415f09785b625db. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTBF2339002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a9563c6c5bcde7d735a2e6cbdd8bb806afd845f4aacc3db99a73886ddd1b3c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBF2339003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f80b22b4fbe0c7ee58d6f35f8983fd6bed1e4095b5bf587afbfc01eb84ddfb. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:46:58Z), 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/QZTBF2339004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f98aac31426c6279dbe144216c71053b0b8de329e0b1f9eb90d3d2855adba0. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZTBF2339005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf1a29bf274b5180792c03d744ed29207f763d4e56dfe49d2a25387707ea01b. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZTBF2339006.