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 0xbffbd8557972265a1d326ff681e4be12134679ff90c140f78c40c3e8012c79e5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c488478-de1a-4c1e-ad77-d5b593cf7853.json and https://artists.proofprofile.net/proofs/artist/9c488478-de1a-4c1e-ad77-d5b593cf7853.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 0xd88a43d135c240dfe2e2ee36cc5393d0b49bdfbbc030d27527d3f1d442117c91. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZDA51808653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b7e233b8ff169461caa20562c216d9a7f82ce12e134b2e1bfef7689679a8ce. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES71827049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72019750e9548bd30faf4c39eb0307dd0bfe1e59624019836d72ffbe5b647a6f. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZFP51949950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67170f36b3460c61fc21241db88e0aa381d8f176c1939e7e6dee105ea6c50b38. 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/QZFP51951979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dd6b596ab96e832494e4a209128218948b164a8cb7d75fafdea8dc6309fdc8. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZFP51951981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6723205fee3f5cea0439f907f6ba5509391302bde7f4efaf75d4c2e93cd6ec. 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/QZFYX1969743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd9854891c51cd8b4e839b165bd10f467e0d745aaed2867b15282adc80e7ef8. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:53:35Z), 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/QZFYX1969751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a6ec85fbec296a6f27d79d1fdbf4f071788701f2739297517e4b7093660119. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZFYX1971420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99ed6db8097315e65aa3abc6a80297bcc0fd196eff78805739d0657daf520ed. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZFZ21956143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45af46a197db30a29838931af9d53df5553f58ba5266a255e6a86ddd9c8611b7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ61912897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01457091816c5005bff92da685df37e6ea4bbeb07a72454c78cf042f49f53900. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:45:29Z), 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/QZHN51942862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dced49f5e51f304b39f19e2a039c435d3c7a199e519916b8a89b429028c5f5. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:17:37Z), 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/QZHN51942866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea5c1dfc2497d77884d6fa59b93b57ca0c198c908c6745809bb6b05e9912858. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZK6P1976715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeab0f1e3f4d91f8449e1fc25049a91f1131c1ea91fd925c1ef213f163038f65. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFZ22075380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4268d53075a8b72223875ee5d4a84102fb41208eb35331d3637e4a9ab9b65bc8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:38:21Z), 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/QZHZ62079225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55135cfa281dd1c25c81907ded6054de94033ac41887d00d78b3652335b52c41. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZHZ42281938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09093ef7325e4fa93af796260f102e8e230734f5590dd6e5ebf2f8ab25d1b49e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZGLM2428481.