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 0xa86e3ccfa9017f311b23540a5024853d61558aaa2bd9263ea2e4d25246014c4d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e7ef211-c466-4444-8e4f-28898d4258a4.json and https://artists.proofprofile.net/proofs/artist/1e7ef211-c466-4444-8e4f-28898d4258a4.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 0xb99a1e04181652726d8afb1010e3f422bc9061b0e15f792a802b42930eb5ebce. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA62361268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69a08bcd8142faa53ffde8c4515f0d7cc265d05b9b917fbfa5660bbac71c7f0. 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/QZNWZ2326799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69fe5b68d31cb5030869e191d72394b3d3f6a6b23c3611cdb893cef84299635. 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/QZNWZ2326798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69a08bcd8142faa53ffde8c4515f0d7cc265d05b9b917fbfa5660bbac71c7f0. 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/QZNWZ2326799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1468e44fac6345cd4c16bc83299e62446cf81aeb8787db67e50f170676f0eab4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPLS2442258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb4b4d1721ec7fc25363275389db9208cb514356c6192ce009070e2bdc6e729. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZPLS2442259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1468e44fac6345cd4c16bc83299e62446cf81aeb8787db67e50f170676f0eab4. 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/QZPLS2442258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731b88f14b84a937616e4485fe0ea08739d34e8da1d61b6eaa2f6cca1b3fb5a1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NL8RL2513427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafc1fcfce6d71be0f397612f7b32902ac1db8868072a58e4f18f9429e39c52c. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:27:21Z), 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/QZTBD2400180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c52c82ebce10e37883b6cd0ba472cfaae366bdc88b30fb6cba6f73ab96b48b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NL8RL2513432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6929fe5b5f1a33c647350a646d54524ea8fd428a45229d12a5aa53fc5c040c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NL8RL2513554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1da1aefc00183ef1a89361b6598f66142cc5dd18ba86f293bc68992e45397eb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NL8RL2513435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd1f5e3edc22fd503aee0b8e1b8064910470c125dd99e243cc689cae55e1475. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN92582868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd1f5e3edc22fd503aee0b8e1b8064910470c125dd99e243cc689cae55e1475. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHN92582868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3805d491cba58d3f68c0be519127152b0fae8567b4e47f27dc322d97acb36bd5. 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/QZTBB2448585.