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 0x17ac7a5ae5afae5c89d301dc600ddec71c4951f1990ad96007a9e1b2d9772cd0. 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/d0f4a38b-e2ad-4312-8596-dc226ef0782c.json and https://artists.proofprofile.net/proofs/artist/d0f4a38b-e2ad-4312-8596-dc226ef0782c.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 0x8ceebf3a0835998793cfc31b9d76501b62e2444a0650255e7f5c5ba8640f3b09. 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/QMFMF2103431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440f9405204f682bf2b83de59110c1467c7c1d7dbafe40d359fd82fb27948c24. 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/QMFMF2103338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc899523d0f0d4f83adb2fbb34a36f17be5feab706ffb4d60eccd23ba1fcd392d. 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/QM4TX2148516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09f4b78d6c9d5cbf52b0aa1d6348787d06f46c244eca27d10871711655bed69. 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/QM4TX2148517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3579d98c898763c1812117abfa751ecda55151a6d6ad7719094c7f0cf8058257. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM4TX2148519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8233fdbaba590e8f6ca36e781c4042ebfb1a9004872e13c561f39490fbf81860. 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/QM4TX2148520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8233fdbaba590e8f6ca36e781c4042ebfb1a9004872e13c561f39490fbf81860. 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/QM4TX2148520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc899523d0f0d4f83adb2fbb34a36f17be5feab706ffb4d60eccd23ba1fcd392d. 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/QM4TX2148516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3579d98c898763c1812117abfa751ecda55151a6d6ad7719094c7f0cf8058257. 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/QM4TX2148519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06450c44ce5955392642323d540fda6106d4ac677d2255419ee2d35b87f2c9f1. 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/QMBZ92079408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089f39ad2addbe3b92f6d0556dcfdc20e98d9111455d8865170001664d10a7a3. 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/QMBZ92062309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a14963dcdb7c5b74904d61dfd8cb0a37581bf13fed2d1183fbed978f85aa88b. 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/QMBZ92062310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca3e7c831fcb486dc547ee3219d9f8e15e2a11f9882608e3273512e0ede0415. 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/QM7282052464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb775e4748fe40e44aa5dc076cdfd032782f8e8753e8c9e15a7752fd7c19f628b. 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/QM6MZ2086130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84802bad622113acf97e20c940541622e9daa7bb6e23786dd962f329bfa2aaf. 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/QM4TX2004069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa193cb566c82705a0e7180d3720d0beba18786440c34a9a1bcd5da18eb95e0. 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/QMBZ91994438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450ebf3f97dcae2daa133d96f792906236b0650aaa6358ee8fdc8b27629687d9. 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/QM6MZ1909214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0582813b93a9ce385e4ede1a0828abe7f3831dace675996b4a7bf49751b3bfac. 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/QZHN32188629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345acd87ba0df4e9dcd8de1fb94ebc203a754b9d8c4bd0cdeeda3e73e7c3ce58. 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/TLREW2222235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3dea86ae2c2355689c14dc82db139d7b497d4d03fca0078bda21aab4724371. 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/TLREW2222216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bebbad104052b704ee08c42a1c08a623b3e3400b5e04a3282349a31a8358c6. 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/TLREW2222220.