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 0x4f035379d7059c9d2c05c214bd923ab8bdc917e4e51cf3935f9d7f37c74b4e4a. 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/641c2d5e-e43c-4aaf-a03f-9a017609c862.json and https://artists.proofprofile.net/proofs/artist/641c2d5e-e43c-4aaf-a03f-9a017609c862.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 0xeefdca160841dc5b58e4d14429e0ef1bd49729aa86b03a878157dc2508add2bb. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:21Z), 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/QM3DF2100729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899e9e7e5d8661a3e4de10e5a5af6300595c9524eee51908a1cbf62225b08326. 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/QZTAT2141357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd87ad6ba92615b7db5eab6b3a8e3a2d98a9d71e8e891d7747fe119f8f45398. 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/QZTAT2140641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7017906cc993a2a37af06b00aedfebecb27d7e781b08fb9af7faf85ecb600919. 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/USANG2236940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8007ce95ec1e28da8f8071ab6d70f9a42e83cd1564e34ca8af82f9db60bc1cb4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USANG2295026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc58ae21e936e18def8278f470dbe70040b065762271c20b7021721f314c536. 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/QM3DF2222154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0b7cb4eb30a856fc33941d901e4a447b8aa80f9edca4e34a4416d1015b66e4. 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/QM3DF2243221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e46665c01a4746f1c401347be7fc958e77b67702a3dc9a6a3ad2814879da7c1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:24Z), 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/QM3DF2260420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80241e9e55617cc0c8b8346699908ae251b44f37ab34c913536e6a0a74fbf1bd. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:31:34Z), 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/QM3DF2269803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae8961fdc25a3ccf6a5f84da5f5d74575ca70b42d78a7d014bc920019238744. 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/QM3DF2285253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193d36d1a394306569e61c10c6ac239cab10f9721ed6fe1e28efada0215d2679. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM3DF2296763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3237c041dc4ccedef624c6d7a9166320dbe5acd6cd8f583c676f513783bfcc8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QMANG2210576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95174f913c5c0257c4a94ee74de25cce57afca18a54eb28f9d5aa4c08c8a1ba0. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QMANG2246204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7845ce39e6b973b72fc124cc1b69fcfa2c5e3b04f4c9ca952fee3cc58faed77. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/US3DF2416443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3282cd33dd491843316d91755ba925550a093ccc7cf4057fc759bf4d183d278. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/US3DF2405368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03d2c8635e1abf1b70b1aefde1b5eab5b1cb0596df7d9de5994b37fad96eccb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US3DF2421767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff93792a2ae60298d3b60cc5a6991bdf1e1373a7c2e9b6d961c759e83b354a93. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:19Z), 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/US3DF2455667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c31b7d83b551cca5834e4864fac1b1266f79f263430badf4d43135565784d6. 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/QM3DF2280715.