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 0xf7bb3857ef37ed68bddf26fa50d5a39c31b89b7fba650a0ee0dd5ab91e12a7cd. 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/523f9928-a65c-4eba-a839-b7ace9cee657.json and https://artists.proofprofile.net/proofs/artist/523f9928-a65c-4eba-a839-b7ace9cee657.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 0x53fff6a480baac56318e84a31428cdc520c2d60b78ba3241de3d7ae0baa6030b. 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/QZHN82251314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d86f770ec51b161f018d6ccec2ae14666e12cd6802736c70405aeb4878c93c. 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/QZPLR2265087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e5699c7f7b4b44e5b111f58eebe19e63169ee4b139a23eb33c935fa7125dfe. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:46:48Z), 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/QZTBB2243665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa076db1409d917d305d47c9eee3d3635933a5a6af060c7165e1b6c1a0ac56faa. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:27:57Z), 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/QZES72383659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3958de04b8735f434862db1adb0646eeec9fd8355355c98e641da372ff0d4b6. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:00:42Z), 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/QZNJZ2317861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2c70b78a137a11b362c8afe8fc2926cc39efc49c11d3e7ee18cbb2ea7783b6. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZNJZ2345918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259d8648e177991f4613c46f22a35da8aeac3e645ed67be822b3dde6d5b97ed8. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZTPX2361762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330ed35339c7618170e16c320094bb40172247b235f4270edc6c04871e9aa5a6. 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/QZW9M2373113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d270b7fc947341741ade1c6aa205b88610894fbbede04d74d5e7f25e850fb45. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZMZ92436449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce044f6e3f62338c47b5889c8b9fbfe778c29dd89cad8d75502ef151870eb340. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZNJV2434918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9eb13a1e172f340dddc8104d6d9ae921ed91d766e1e40ff04e2a964e10066c. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNJX2413291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c217e0a28b5b2f0bf57bd56d58ce88400686126913691cb88c33ef22c5f8c39. 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/QZNJX2436938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb949db866482b66d16cb43f28b08b1b9b2a12f3d62497e5ddfde2df93ec84ab0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZW9K2486108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af38df080da38a79d5d09ce6bd7f75283697b069ae23f00814d095c20a97c98. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZW9K2495009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56778ff9b18c38c09c79de895f55a077aa769506e733798c96ef08f9a9d8dd3. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:55:26Z), 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/QZW9L2458044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9036e42420a4e861ccb313a6377d7bfb41686858289306e723c8b4a6898372. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:01:26Z), 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/QZW9L2459479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2291544fa5096d38cf685e8a18787a5e8e49680658edf8bf0d5e16fe486b0f2e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZW9L2468897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe150eab51175d966a67cf928e46d9de3e153f17fd70d97eeb0eeecd934790840. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:28:37Z), 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/QZW9L2485305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f303505608455e1125206adbf945b32f60e3ea58e955a170f8aaa38d8b46f3. 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/QZMZ92537887.