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 0xee518421ce1e979874f25d15a3ead2e80001616b288254027e5456c4d682b0f9. 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/b38636ea-faa2-4ff5-8810-7c119ffa3db6.json and https://artists.proofprofile.net/proofs/artist/b38636ea-faa2-4ff5-8810-7c119ffa3db6.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 0xcc7f6f3b8323be762209244bc025c61b6707ac1865e0b406b3622f10df5455d8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTBA2433338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d13b6260ceeec20257befb5f0b24b017815bcff3d7638809bf542381898616. 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/QZTBA2433334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98341da1872a3de2e798f7dba35f90f233d1df5b5021b0432480bc79256a286a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFS2439333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcf224f3719cc9435f118db720a515bf9d92e9535c02d54e758c766377a46c9. 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/QZWFS2439337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d7d0ee410695e81d167370ae35f2859a78427c28fb5d988ad3c91885d30bd6. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZFZ62565751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5518b70cbee6460cc6e8b0fa7d5f54764dadd32aeeccace014a5aacfd6210c0b. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:49:45Z), 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/QZHN52531815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e7e752902ea59731f1b9912e296df64cbb050acd700fa42fecafe499b7eee2. 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/QZHN92528766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f76e5234a5884d5693e7815850ea4be630eb0e8472b3ce9e67132847435987. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN92528767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef0d5ccfebd68e48f1daf3d7963cab0ef0673cf2a57fff3ae57bfe2a884ccef. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZHN92528768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0accba6665554797b08eddd999e58d07ab9b5d32aa89a47fd4bdc99dad353ce4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:56Z), 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/QZHN92528769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148fd10b5ef406e6a2bfdb028846d3cc495912dc62ea26ff8b0011f1940d325e. 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/QZHN92528770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf032c14cfd415cc7afd2176e04db579ffb01fa23b1702752e0c3a395c903f09c. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:06:11Z), 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/QZHN92528771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd335068ab43e922cdf0c497b64dd5501d024d5bff0fd7d8f2f52f34db8bb0537. 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/QZHN92528772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ff7ea9ea725eecdec9c42fc24c075a2016179818f1f477c7831ca40263ae61. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHN92528773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8c47b56d5884acd37afd3bc571b25c6edc069f547deb5ca00be75f214adf8f. 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/QZTBD2552457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c92d82716a742172a3779bec409f5fac77bba93e0c96ca36358466f18c4b8e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3F72579323.