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 0x06dd147f3e02bb4076ba02518e7553aecdf3f105a2eb4d9eb99b6829728a3ad6. 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/d94f41d6-802e-48ed-bd40-fad2a2a455a0.json and https://artists.proofprofile.net/proofs/artist/d94f41d6-802e-48ed-bd40-fad2a2a455a0.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 0x406b2dd299d1d049e192837dbfb7d696a912dd228b2db43a6e5b8bac7c6198e1. 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/FRX762369349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a9fda43000a76c400a257ab2d3917c67f382a965e81d1f160e423eb2060379. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FRX762369350.
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 0xb5109b8ddbc0fb70dd4ae49cea2531e9858d0901096220f2f1721c6320f480d0. 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/HKG731605922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5e712ed1060a4a4992f123aae675627626cc3ebc8a68fa197450be7dceaf8f. 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/HKG732433897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050fbc1e57737e96c71d66b10baa85d8d0c2ace9fb03ad840c0db0a0ed656359. 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/DGA052435301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19511e915e31fd380fab0128f68c277b101907531d1cdb2767630047834df8e. 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/HKG732452178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ce28a41d2c1d40db88365d47dfb3704fd0901e591c64d4491c7f59db38c9e0. 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/DGA0P2317026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2800657ea19fe2e88e2325261e5cac445da0726bbeddcdb7eaff99c59f96934c. 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/DGA0P2317027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dafc801c59eb3f2c2ff35be5a1ae0290d9a48a0aa958243186ad0e743fec67. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732345477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5d5d994f27838b5675adda06702ecd2c3dbcadb029b2976fb8ac136963b2d1. 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/HKG732331579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f6e835a4d1a213c87fc7fcd74e79cf061d78714c261e95a06e309af0e4a54a. 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/HKG732324685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43ae5c478e723db08f3996fece46153eba3e274a79c99864fdeba092c84cdf8. 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/HKG732308562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8015ebef0accdbf8622e7dfc07abf20831d4b0f143d7741d90b82703511c0f9a. 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/HKG732501293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32938db24df95b0644f4072216ef2c09292eb0ab15c30124a70746c79cb61281. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732527608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d8fb57a4d125e4ca825ce8982415c821f9de0c6868c4bad282fe9bc062cdac. 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/HKG732515193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5e8e5cc0f3a69a235a6509a2137bcc33ec60d289bde5840e04727e2c6b63f6. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:08:00Z), 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/HKG732512967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf89d655b2b931e18fe31da92989d9bf8d47784812a755db215ff4bebee59e9. 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/HKG732505085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a6b0bedb22e1f8d4a7a7787c068480c6e144fa0bfeb0da4077aaca83f6e662. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG731404133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e18ff997d85c906ead82853a5229bb636616355cd05d553ac82de10594b42b. 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/HKG732499179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf4a2a73daef08d8bd3bde02dee3f67d9cd851c8f81aafefa0b1d84956c4147. 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/HKG732493634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0574d046db3a6c5fc19843c936af108196dcb369cf9220825bf959f4101b94. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/HKG732513574.