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 0xb857ff367f6b8ca9f8661e48ec3f951f287e42605bbff457b04cd3a17713e2f5. 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/b047e394-e588-4103-8f69-a86576e3362d.json and https://artists.proofprofile.net/proofs/artist/b047e394-e588-4103-8f69-a86576e3362d.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 0xae3f426ad9eb2a8911316eed4dbbabda6ee99773e37e37275c57fc2d159b079a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAEY2042927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04818a0f06e4ea63ffe362b408a43703eb0474c7d3636170b6648c2fb67ede29. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAEY2042935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c89597d789a1ea4ba7f23d45f3ee4402fca12e8d74abbc02d4beaaf630c2d27. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCAEY2042951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81dcc6c16e3087c142dfc38ce095c6257c130cb3fa8edcfc3de5145ce0963fda. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:45:45Z), 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/TCAEY2042975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef6fe6740c603a975ebb22508e05785ff247c822cf3d2f2341d4f0ca9c297e6. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAEY2053163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8588fbdb7261ccc1803f4a0fd6b7a16fd11150ea0c5dac394049719eed141fe4. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAEY2053197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725a19e3ab75a2523db6169e03d0ce4dacdc3a110cc1a6d8cb573ad93af3c000. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAGP2278230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5a0614fa24d5fdf709e4a85ba29eae285ac6740bc0b9967edc5a9b3be4ee6b. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:45:21Z), 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/TCAGP2278238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f07a65e2c2fb9ad6ee0e5bf861398a569cb845503079bc4958d23a24b5e609. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:32:42Z), 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/TCAGP2278287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0382e06d44fba3a01f64e33333b7116dfe38d3246cbd38d4d8f664b5c2c81aa9. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:44:34Z), 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/TCAIP2405023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e19a7477fd0e5fe02d85978e9f3813e874618c1c8fdd40520ca3e99ff582e9. 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/TCAIP2405030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398973049110cabf9d62cf87a872712e429ca14bedf73724bd866867ec87ea3c. 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/TCAIP2405034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7711157770b1529a42cff2f985f4eed1f83da2441a6fb71f295e7c917003d7. 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/TCAIP2405038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1769ac6b669b9d3d2addf252d6ac77c91e17cb09943f2b1bb564cecd50aa9d17. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:55:43Z), 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/TCAIO2405051.