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 0x1a7d3dd58b1933b5b61e551e1de1ad95aec12fc643646cd083afdf70ed283240. 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/9a78a8cc-6501-421e-8da0-701df351a780.json and https://artists.proofprofile.net/proofs/artist/9a78a8cc-6501-421e-8da0-701df351a780.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 0x756d19cf877b2efb65a133d1e6fa77739f93593fe819ec48452bcd3b8c5f12fd. 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/USZUP1014204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80479b2d06f584e14085d0295bb7206a8146d644abc61eb10ac16492be5dcfec. 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/USZUP1014208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043112134d96bd61a94e319ff173f43dc0a80a77b3d3200aafa6c3e052970414. 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/USZUP1014210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32e670eb13cb7fdeaba7ce5eef716e413d09cf55f86449609331eda4379b2c3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USZUP1014212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2429bf69ce8218fe62c61f81ce92b4683c00db3ef63eb3660a2f753a8e76c74. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USZUP1014400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9c0fd5e2d047cfe904561b1e7603d4126023378dbdf5a6e530b30872fe5699. 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/USZUP1014401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d70953423e21b1d72cd291ffaf86ecce74edb6d905d5d0b5c12a6812e96bea1. 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/USZUP1014402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161ff956362e42b561c841c0e64c4fe144711bf7f71efd7b728cfc061b6629f1. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:24:27Z), 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/USZUP1110033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080f8612f342e8bd102a5c615d3dcaca3ddb707c97f594b85d693c20cac5d6ef. 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/USZUP1110034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e22118b35d3c3fe1ac2903456ead7568e7f54ca369e172f616201bcb5e987b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USZUP1110035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f21e51a92c36e9abfcc8b94f621798b9ded72466517e2441d3fbdc5cb1c7f0. 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/USZUP1110040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa273d5053778be630c73d5cde91a43108f1f25a931c4cbe428e7b48580790d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USZUP1110041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f7788175079f0002eb44bf251f045ab5c84647d560fe009bf14ee36d86cad4. 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/USZUP1110286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b98eff9836abd6437f052312cd37e2abf023d545bb1972285e1a5c48f44766. 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/USZUP1110287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b41b32575fdf0297ef3b4bdf850ad82a0fa7a83bf34a4604397544e5a8bacb. 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/USZUP1110288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f9f34a18da1afd9b1df7a452486ec60ecbc4afa1f09fb7125ec1911d140452. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USZUP1111359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6c28389328dd6ed3e9b0125cb7c96db5c9770124113149141e787e0a8eb8a6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USZUP1111358.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb41cd1bf9a771b0ed1d7882a138c899f9ebfcc57a82ed5d72c3e6715ab7e3a8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USZUP1111360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a155df9af095eada0fad10cb3af703eb653b57d578f48f39f6df77766bd90e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USZUP1111361.