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 0xb1ee90c6c9fed05e38d7dc5efb68f0cf88fb2b4432cd97709c883c0682300907. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db032bc7-288a-417a-8a98-a0beabc031c9.json and https://artists.proofprofile.net/proofs/artist/db032bc7-288a-417a-8a98-a0beabc031c9.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 0x1af5358cf4b2e0e45b5a13687dca40e1c4fd91f125c7209c0ca1b029d45b195a. 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/FITTS1600117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66110cb8d05d962465e82b315178ff758a1c2da6dfad4a370e0a9712c70b4b88. 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/FITTS1600123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061826f0c753603bfa2093fec45a800797952646085444756616cd0aaa667c1d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:58:22Z), 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/FITTS1400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0a0d088f28b498c152662c1c86212dc4200d73525e896945c86e25f090da59. 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/FITTS1400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb830267294068c79fe3bed904c13c50ab52c351df81c5cf029fdf7787abec2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FITTS1400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba23c0a9795893c700c585ab3c53900cee4046bdf4cd337286224a0350d522d8. 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/FITTS1400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1472342037f6029dc20741bbf0dacd6518738fdde57b6d9f4b4c0fe431e615. 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/FITTS1400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2fd1178affd5c2c085e66c04cb848e160069f2c4284ef2254cbe2278c29005. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FITTS1400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe1485ac84137cdb2b7978bf67a425ba1b2c112be66b5b8cdff6fee8b20fe01. 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/FIITA1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5810bdd2d5bf83bd3912df80a24920603ded1ff2da11d8db6b50abc9bf6398. 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/DECW61300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ebee2167f5b5b0a8c543a04e011394be049a54030f9641dbe7e43b1c3ed287. 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/DECW61400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63913a3e75ce27d8dc830715febdf36d660116e1154975adfb30cbf798459331. 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/FIUM71400435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d6445e35eb8f8b7167846064f0baeb11a3024446429bc23d1687137a37be6d. 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/FIUM71400307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10674b593ab783896521d622af655cc8e968d3783c15e7941f3941d00e82017d. 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/FIUM71400317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eddf2f9d0ebb9bd62904df27e1f1d69799a2fa2d316252e4362707aaedf045d. 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/FIUM71400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76953aec6e78eff54118122b6af9d6a9f76d79adc1534962523bcfda8628e496. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIUM71400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39112c0ec023f98cedd0d0470f36b8d644750639b12f29cac261a4113445d742. 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/FIUM71400033.