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 0xc41b495d02307b04138c3cf2778fca9ef8ba96891e226fff22a7dfa57c4dbc46. 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/b83f3dd7-d541-4361-82bb-d67f3e1aea8a.json and https://artists.proofprofile.net/proofs/artist/b83f3dd7-d541-4361-82bb-d67f3e1aea8a.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 0x9acde19f193e5094ae8a5983b6fdacf179e91c55e375ce6386e2eb5020482d11. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHNB2291609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dc488d6877b4158e3d84f24621bf636b10b1332a5919799cd56d4bfde4590a. 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/QZHNB2296985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531b55fd1433c63416a3d068ccc1c4dbf8b40a3a8a6f5afed28629f69e25506d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6M2207408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b66acd1a43bf9a58ba9ca8293d8884792316184aa031f357fd0c2d3d81cfee4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6G2203962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd948bedaac313d1e8c0a8dedf65755de7278a7646e94921118e74160942e75a2. 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/QZES62362781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb8e0c955436697074a2da3e91b79c47df162f870f315cfda85339b8c44131d. 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/QZES62363095.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf489173e8c0f236a3e1ce6d4a0f158ea9615b7fe8c3bc19dd459e36df0f8076f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTAZ2337424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36ae1a622c19ed979173235a24a8f0749b6d05be8396961de95209250a66b4f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:08:29Z), 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/QZTAZ2338222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888b6687e9d7bc8ca9e5279875b13a49dc77fb64029fe130d716454ee2da5eff. 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/QZTAZ2338226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbd53ca7fde9a474430e03dedf2db1547ce67ba90259b167885a7b5ba95952d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZTB32404513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022299875dd363c9c2ffe429fb245a84df3759e87e3dd4d78145c9b786a26ae4. 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/QZTB32404515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6779f8066e32e58c2998673269a4df65b166227fc0b241e158190d3bf7aa960. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB32404517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808e3daa4e7c4f24da9a9e5571110b9ecdcbc769217f9daedab2b2900d870ae0. 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/QZTB32446716.