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 0x0e615ab55112cc92446a94edc3738d281a9c8694b5a6e3e46d8e897f65153586. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5934e294-eaab-48fd-a3bb-ab7debfa0f87.json and https://artists.proofprofile.net/proofs/artist/5934e294-eaab-48fd-a3bb-ab7debfa0f87.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 0x50a811742b366def30c8322b98a36aa05f607cc3ad4389d663993ab672287fb1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR43D1802008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd05c1fdef7eabb6bb66dc0ab948e2d73973a3343ef220b88cc6d6069c72d30f. 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/FR43D1802011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409f9d2176b689a0b61041c35fd6e62408d3df170eb82402731edd3719caa83a. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/FR43D1802013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ba83bebd9fd782f65e83b2652a9ca43ef0bb3158e32eb1b490551216300e35. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMDA71525660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2d20c3db3e32d31af29f831f6d65e83290b5677e72f2fb88b1cf52c2cad3f5. 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/QMFME1509383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc6fc9afffe78966503099ad7673c33ef9daeca0d14adc7dd8f90420a7d29bc. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:09:23Z), 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/QMFME1512737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef8888b9417d970d9b7a8d78693c3e5ef3db46bb67852c20d27c48612508387. 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/QMFME1512748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efe2504775ad99212223b4a24e6e25021a62ef556b5f7f39481bcbe8204fe18. 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/QMFME1510423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffa19c6c2b7dd72dfefe3e25d2068509034a8dd43a9654739eba0540b89dc6c. 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/FR96X1866621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2115feaf1cb0dbd37fdc96ab6d6b55fd2a8464c6364db261b74b947918a45e2f. 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/QM7281937227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dac970786b5e3661ea63330979a6197376f9967d501e8211003518bdc2d0358. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM7281937228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a942c00768b400a53879359af81050ba3f25dc226c41765c8322c426b772e4. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QM7281937229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eab10a3e6d4527b3a3b14fbbbc6ac768b3e3961986898f21f28fb9036185520. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:06:14Z), 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/QM7281937231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c30dcd9e81474e843b3dce5083af4b4fc1c91de0bd4163469173c908ec20666. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QM7281937232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9ba9fbfc18eb573ff70cec2648c57cdf7f390f6eac3762012fe713196d9893. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZYFZ2345801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02838c26714534688cfa4d9f83f2ed13d8f0c46fb71b88ef8b730ec8020ac378. 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/QZZ662423277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4384b8c68761588a9999c6e00d8ce9d4f2009392c00c580871bdd7b00baeb66. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DZA102401250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2427a52219f6f2275c6e9428fd35895e05ad5a4f9a6871208d60d07439c0f380. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR6V81499638.