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 0x69f70402a540c5ef2733e4f582df6c6c515777a1d9b66b5d1341abbfc2d1c5e7. 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/8e4065f1-ddd7-4c12-aeed-00bbe03a74f1.json and https://artists.proofprofile.net/proofs/artist/8e4065f1-ddd7-4c12-aeed-00bbe03a74f1.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 0xfd6edb92632ceca9405ede6b49b2692030d162289a73a528070101107cadb807. 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/DGA0Q2379765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f91563e54110369d207d92622a3e5bbe051a52030e10383349d50160f7f31f8. 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/TCAIG2436206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cb6a45aebcdb7c3ac4467e2e7197d47b93c364dea7ff12cb0d686f2993eace. 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/TCAGN2285369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3dc89bee4871ed234a2160cc6066a59dea6fc159942c45a36cd851061f7c56. 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/QZK6G2515834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff11acf3f8ed2f3bc6830dd55db773f9b05dc791f9dfaf0e2527fd0718ad25d9. 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/FR9W12508676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a00890dc7ff0b96eab67ad168b06186ff614af8e78cf0d894842921b844cdbd. 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/QZES52511802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15f301aa4b7bc87cc4109ba99ca501219121402c04cfe7b8a4c469c76a340b8. 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/QM4TX2563916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a71c76da744105c1441f483a34b3e858613e3087d61b1c802bda5ea02dc8c8. 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/QZTLA2526368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda89b3c27eb29c278adc90d31f0c7346d7ffb5ae88caf4235bad3a9f2e5c195. 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/QZFYY2533860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dde39c7fb33d925917ed1169d2e4686a826558a60481fae3a6eed35f0371178. 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/GBLV62409617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64d511fa87dc266ca5a9f926f7dc35b0fe08affa71fb00d9e4895222f1755d6. 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/DEPI82455281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985125c1cf0e08469de64724c86b1f99895a845ca8cb1f2b55385bf123c5d442. 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/QZQAY2459830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bda232b33624d927d1023cc449ce31b627d6919f3cb1cecdc42a759f138a19. 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/QZES82411832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef33aa0164890aab1f47a89c1e99db9f1114581925df238b77698fca3cc7767. 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/CAQOI2401784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9f3b047e22648f6be0f09861617edd3247d79704899847b5ee2d83daab80f7. 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/QZWFQ2329767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fe2da1b5225f92049e537253d8abfec17649260810180f5ee0b701223976c1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE6XY2385486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84313e1a4df4fd96aee02bfe3d7ef3770f3952ffcead9f140f4e7791642307db. 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/QM3DF2257310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535b1b11812856d4cf468c94f869839fd0171b32508f87d8d63a8e76670cb824. 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/US83Z2321798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3527d853ceb8556e6c540dcee6dce5d762b2d3b84de6e7889bc5d02de02558f5. 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/TCAGW2384621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf89aba66b5bb370ccfcdb647f65d88ed638288098f745cefacaecfdae442db7. 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/QZTB22411426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4424643038e288b02e6f6beaadb34e429f08f1ae33106142ecf3236fe7639e5a. 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/USHM22289015.