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 0xcf2fdd9eaee892ebbb6d5c1240a4139ff03e0a1604c2560d890e8534f160603a. 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/42e04298-83d6-41d6-b982-5aad8f4f9b60.json and https://artists.proofprofile.net/proofs/artist/42e04298-83d6-41d6-b982-5aad8f4f9b60.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 0xb9e69cfaf8e9984972ef9989ae8ab034c6a12f3e691fbe09f980e0d0e4829117. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCADA1740480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea5b3bf04863d10cadf5805bd453fa419bb42b9aa9180f5d21ddf2c0a504997. 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/QM4TX1800606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b52acb20259a233531180f6fc65fd0845debdc62c64d0195180f33265b1779c. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:59:22Z), 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/QM4TX1800608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7da3e9212f7a46f5971f7b7fcbabd399fc69fed7417757dc0e02a1326193871. 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/QM4TX1800609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4e7ab304c085b1695b1ead39a32ce6f18b4f861bb136478c01688554dd22dc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCACT1638075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e69cfaf8e9984972ef9989ae8ab034c6a12f3e691fbe09f980e0d0e4829117. 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/TCADA1740480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b00b2f253349f367aad193b086866963162c8e148cc9a8298f5f37711ee1ce. 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/QMFME1940987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37292d11b407d99eabcb39b50663d87b74a72ce851e5772249b7f17cba8b4bfc. 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/QMFME1940991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01de8fc606eef9f69be0798ff64c4ba6fc6e055a38ef023fb3ac031eb3b6566. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:08:34Z), 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/QMDA71874790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd31e54b74a708fc1945818425e1181f73ab0b4e7723ff9a3a6c618d8054897. 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/QM4TX2459929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1067b76bcf6023518b8409f43d6b61e337c5f5d34aec371116a43231a68eb54c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QM6P42405413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70427e03eeb486f987a982bf40ed6b0b48566b822d173ffafd8a6e5579270bc4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMDA62408675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70427e03eeb486f987a982bf40ed6b0b48566b822d173ffafd8a6e5579270bc4. 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/QMDA62408675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1067b76bcf6023518b8409f43d6b61e337c5f5d34aec371116a43231a68eb54c. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QM6P42405413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd31e54b74a708fc1945818425e1181f73ab0b4e7723ff9a3a6c618d8054897. 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/QM4TX2459929.