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 0xff0329c3402a660eda81d9cabb179c73a6ec7775e8302826f6f3007e6a9999da. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62b4f7b8-fdd2-449d-8f12-624c8b5345e2.json and https://artists.proofprofile.net/proofs/artist/62b4f7b8-fdd2-449d-8f12-624c8b5345e2.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 0x28742d820d42e87e85274267fa85cd3a67dfe48ec6f576b8e5f9b1241df8744d. 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/DEZC62383987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a4370e40bb53999899fe0f00ef84908b74b771089c5fe79532461b56cc1551. 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/DEZC62383988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdaf77920b76c9985c100d928f7f68955939dc82e5f42ad8d785ee8d0da36e7. 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/DEZC62383993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30bea8bbaf539db5927d5ddfb8d1af740dcbb0c506f6284dfa35c372bc5ed4cd. 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/DEZC62383994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cc82f245c91b8a1a0f8c8650d26176d21def6f4e48973b28cc12500d6c6328. 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/DEZC62383997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f11561c2bdd3fe8ba6383459bc215bb2e1195a35faa528402794a7ec8fa9d0. 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/DEZC62383998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d24b3b1ac47efa25b9f9c7e2179b806f5999f3c6dc17f8528af703c935f0cfc. 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/DEZC62384002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe801db989fc5e944765df66ab37db4b6b54b063f93fd2dce3b4d012018d25cf6. 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/DEZC62384004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf18b042470cba56ade5e2364ccfd8aadcdb7689f2698d08f906a35c487575d7. 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/DEZC62384006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695ae13adef76f18a490a738246740d17735fff360e857197dad184746eb430a. 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/DEZC62384007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d96abd52510476291b8624b7baac57e9c384c4f60bcca30f6d827c59800477. 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/DEZC62384008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b1d1d8fed0331f1e59a3d3a6ab7bd40f224b163cf21b24004d43054fa644fe. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZC62384010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bc4aacd1c298caad5ab32fb06905a9f3be3af701e44a3807baf90a5e4fb713. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEZC62383995.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2cde28ad63594b085f98c783d229b97be729e812ac894a8bf4618982e753e2. 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/QZDA52247548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09506638e7e8570123bc4066891738d9bd99c064d8238b5924fcaeae1983d583. 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/QZES72282381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cb17782e51988cbaa52a9ab2e2eb06d4aedd60992431d3e9bb6eb86d8bce70. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZES72282379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce20030498d9926c31009b5a19e8202c9d8280878e8d5371dfe44c16e719ec42. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZES72282380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15369098b823f2a1f62476068092298b1edf9bf39e075966a22cb91dd1bb0e3. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZDA52243506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07e4ce456a48c69d52cc312c23ed12a1322330794f7fa2288b9b5f5a9f01dcc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZES72282382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5115065b937c3ec748979f726e6081229478028bf1e266d75abed9d4b0f9b9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZC62447073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6f16415141877cfe8947465d4beb2aa2bb3841f022386f372db03dbe21ea6c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEZC62447079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd926a135a2de6a790f267ec9b078a81a570cd82ae473ff760fb4eb5d64b6fe55. 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/DEZC62435006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc0ad1659fafc19426cf1ff200773a8966d3384bd8e11937c86bbf682609c3b. 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/DEZC62435008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe5e41058f9598d99d0881c01bffc8a69e85014ea98c1561b8d137e5e9b1b37. 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/DEZC62435009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa681f3206156c3fd85a276e4fe49afa51dae3f3a349fec17966bf24e64cde6a4. 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/DEZC62435012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9815aba85021f6eeadd323355f20fdac3b14ca432485e560289fa84fdb3bf0c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEZC62435013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094156f4a6af83188097289f8c9c8e113eed3ef7bcc17209388f8119431f7d17. 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/QZTB22281076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2495ecf250334bef8044592844487bf7c769f878c9faeb23da06a6130be96fb. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZFYY2347122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9484e911ba266089ca259da551800370368cf28e98f6f733810aaa4d663480. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZTB22299902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346c9d42427494f5dc849298fc6e5a00c7a9baf660b1e3aa2112b274b0edb4e6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZTB22293663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cd4e6247eb91f3d790ec2cf2e2b810803b32e7377399c02b9a1de070804eab. 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/QZFZ52100173.