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 0x64234e40405c52404dcf60bb2a788201704b2d53f76f008b105ff932e6fecdca. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d8fcd61-161f-41ae-abe6-64b01584b244.json and https://artists.proofprofile.net/proofs/artist/8d8fcd61-161f-41ae-abe6-64b01584b244.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 0x897a0519f312d0aa8b2b472f76109fb8439fb10c5e2460c1f3fc817c99cd3089. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKQ0W2500119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ca8227f88e628610dc77e1c111f3e30e5f6b36ac9e359cca78a558bb8ec7bc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BKR2K2500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e17940be869d15af0f4f12a25527b5533f62b53275f6b695ecf3189e154cb9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BKHYR2500231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1a978e2e2b17120ca20f70987d48bab6ef553e9d3293750618bb00f08a0c6d. 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/BKR2K2500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbee3dcae3be151aa017d68bdc6d0d05d35a31fb76d0032efc78f0481fc37f7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BKR2K2500097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02f472d7e4b228b38b452294c43a39ca07765ddc222c2da9fe6c9a28f3e8c23. 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/BKR2K2500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d42202e9ce7a916e4c299fc0f38c818c3c40a42b4151fce1af1da111cdd323c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BKR2K2500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a34afa5fb86aba1b87f107b5136b4f0c1f0e6e4a8a1d89d09377967b4fa07b. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/BKR2K2500050.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1580ee878fe005572ffd7f5e9c46dd8d66dc48a96ade7860a6cbf2e0cfcd66df. 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/BKR2K2500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98152502c14be5af7fbe71703eaceda9a082e39db14526402977e253e950cc6. 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/BKDKM2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4724e2fa3071b0e543406c8ba1dc257fa1f72502f9a45b0d031221414a624c4a. 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/BKDKM2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afb161614fbb28db91dd58407403828bcdef57983d1f0f34afa64376784ebd6. 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/BKHYR2400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7351e2043cce7d89a7a221d5ca1ae82100dea4f309cecb23af57203545ab63b7. 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/BKHYR2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5bb12dac0dce9373e3ebcd7ce1d8510586ea53413db9a3d82f53be81508935. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BKHYR2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7129cad96c505d8f3f7918fadb17d0ebf1f4927f7ad6334d88f32155c810f9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKDKM2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7ec238007f188c463647b05c37b3e4d719e3ff175d5370b76a543652c62b39. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BKHYR2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7a55b8d8dab9fa57a0df92a646cea38e2fd6aa3ab8b47823241a2538d4d203. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BKDKM2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c3dd1a4496acad666f204a84e58a26a16873c0bed7d1c573fc47e876e0c749. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMZ92483940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0caf7d1e21fd23c5df77370c5016832a32447899ee70485ece8e2cb9d3860436. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BKHYR2400052.
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 0xa747398eea1cd521e74a171248918c38359cf0368034dd6058df7ed51bbb1e57. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BKHYR2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120f82825eed687b93c20aeabeeefe1eb7003feac38663c84d9722d841745ee2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BKHYR2400434.