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 0xefedc00e648b6a4bc0f320cf297841c5679bdef2a4ac56d9dac84b59360ef3f2. 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/b229c54a-e59d-4573-bde5-14c597c6a225.json and https://artists.proofprofile.net/proofs/artist/b229c54a-e59d-4573-bde5-14c597c6a225.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 0xab06b25147826a37fd23c203e39d77735ad067cc5e6961c8077bd5c753738be4. 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/TCJPS2295554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31b08d4d9559cdefdde280be24e5e65ccf4033d2d7f1422fb0d8a8026266e28. 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/TCJPT2296292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31b08d4d9559cdefdde280be24e5e65ccf4033d2d7f1422fb0d8a8026266e28. 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/TCJPT2296292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb1162cf46b07fdee8f46677495563783382cce9715050a90a562fef02e51fa. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:05Z), 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/TCJPI2526501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f23895f9129b1d45ea7f961cac6b634ae0eb7bf15ac996c5108aa0e73e2aa8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCJPA2444292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a8635e3a41ec5b9b63af72257bfb49d3feec26761c65d2059221e5771d5809. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCJPZ2460761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f55573e512f751c833cdfa8faf20107c8ae5a4172e9b463d48eec2ff7ac571d. 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/TCJPY2492263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07613347ca082de9583ac6a9b8747ff2fdeae6d14c9379680c5453149c72c5c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCJPW2357462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0071cf8312a45d11537aa4f0bae999c5e9b06257ee40455858355b8be2ede2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCJPW2333122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089a0082aed831afdd65c0b50fbbe2ce92c0e3e42af5da5c7b0420837157c24d. 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/TCJPV2386843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c9dc38d5298137ec1a0f532300a734148087c5d24bffcc2d5c2149490798e2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCJPT2215413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85fec3f81e72e7ce5d2292f2a85b7f29068013d0b446165ba61fe268fae7dc4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCJPS2275990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad73ec2cf9844f3d4b80372b3c74e34fc1b769904d8652012ca27cc365a1314. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCJPS2218136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1d3dac74d8374ddcd7517bfe5a24bb0ca2507f8f0570647908a9cc88f5f2de. 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/TCJPR2231703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405a9a0d3d7604dfc6812f3d2f4ab73866d0d8d1e7fb254422c5790ca709bb61. 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/TCJPA2480494.