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 0x3cc7449689b76a6bcd0b2ec38e41d08deeeafaa97d09e35da9ed2f53e8d2f8f0. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f313c8b8-a06c-456e-8306-fba83049e08f.json and https://artists.proofprofile.net/proofs/artist/f313c8b8-a06c-456e-8306-fba83049e08f.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 0xc97252a94ec5b0ac5fef52b19fcbdb333fdeb8c62e0eebf5cea705d9603540f0. 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/QZWFL2303198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0858caaa93892ddb6589f8a25db7cee5c647d139e0bf3bfbb00f1b5a6f8b29a4. 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/QZK6K2356578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3ec319e5e703218581d06a25aaaf941ebf2eb973a9e57524c67ae194142959. 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/QZHNC2393996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd5a77515ea725c6936be88aad3d2b3c889dc80d3b7df6b47ac525132b1f22a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZPLS2377160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394372394d9c0c319fa02d67ad0ae165229f7c2b48363db9458c1f354f45df2e. 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/QZNWT2345919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09801d223c09b4576377262b38706afc5a0361fefb664ff3e3876b2a08b2389c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWFL2303199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa897ecfc0b61e630c3ed16b30841c12977fed20e28f6eee76c09ee4244d574af. 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/QZTB22380962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bd77e7bde83eac4f87777f02918f54f8b827baf04101731db83edf4aa7cb21. 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/QZWFL2303200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aeb2a5b5200ede75fa4211d8c14b4f08c6178077e0cf0bdad53b081629fe080. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:14:25Z), 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/QZTB22382318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b76b5ae2b698997a25f650a8841bed85efe84c3568654db1426be0da888642. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZTAU2364674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db8d4e09c85309dffe9e8ce5e870bb34708f4b5f6e5725c14d0651f4e78a3de. 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/QZWFL2303202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b020acf8fe0a7d5efa560aa7612b56787903def3693196ea8cf5cdcd1e9790. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZHN42387543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aeb2a5b5200ede75fa4211d8c14b4f08c6178077e0cf0bdad53b081629fe080. 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/QZTB22382318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa897ecfc0b61e630c3ed16b30841c12977fed20e28f6eee76c09ee4244d574af. 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/QZTB22380962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b76b5ae2b698997a25f650a8841bed85efe84c3568654db1426be0da888642. 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/QZTAU2364674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd5a77515ea725c6936be88aad3d2b3c889dc80d3b7df6b47ac525132b1f22a. 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/QZPLS2377160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394372394d9c0c319fa02d67ad0ae165229f7c2b48363db9458c1f354f45df2e. 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/QZNWT2345919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0858caaa93892ddb6589f8a25db7cee5c647d139e0bf3bfbb00f1b5a6f8b29a4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6K2356578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3ec319e5e703218581d06a25aaaf941ebf2eb973a9e57524c67ae194142959. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHNC2393996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628028c033ce7e283bd19db63aff7fac9a0161224caec8d9c70e810451d92379. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:11:03Z), 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/QZDA82332100.