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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 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 0x84be38b33b3843357a48c2c0b28738759ff97fdd489d5794e5bbd44245656f70. Chain 2 (Bitcoin): anchored in block 953857 (2026-06-15T23:34:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02ce0b26-ce64-40d8-bcd2-373489e7807f.json and https://artists.proofprofile.net/proofs/artist/02ce0b26-ce64-40d8-bcd2-373489e7807f.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 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 0xf6d3e63597dcf392f1d94f06b4076342ede0a9b05ca6c3d18708774347778ba7. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/HKE022234783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838c76a4e5b590b10a97868b3cbe298153affb76f99645feee3c20b27936a0b1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/HKE022234784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e5a1a692186b6fb1941a7e4cf7729f885a097e833a528c73439939611fa69b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKE022234785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f034f1cde6fe4c7f7578b952e4b5a0edcc5a7dbf16a9805430ba99c0d36fd38. 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/HKE022234786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee69098d4e49f2ddaeff6cbe83d675ecb6ba73c9d961d662e1a830a7ce6b4af. 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/HKE022234787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ed01486aa79e3cb8c5072583bded974ec9ef96530c036c916ced956252d645. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/HKE022234727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f58f1f605400a4b4dd749972e73b284117ac64ad80123d3b304728b688a4be. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/HKE022234728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5bf7e2f5f1eef640b52e6ad4d0cad0806756c331b96e496c292c2fbce63006. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/HKE022234729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6632e83db2ccf6ff2777228ac9da9c9cc97c45af57564423e3fe2cc37f75b1. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/HKE022234730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cc25a5b3b494175e0e1bd6bb627a0eaeb9cb11d142366c0820438da0254c93. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKE022234731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb5b33974b1db092090f315a570204b3b1982ba1984e36acf0eeb8bf7101c73. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HKE022234733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf80e2302e00cfcc7d4c1b257cdca79652e61c53cabdaccd08f818bf490f8cc. 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/HKE022234734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b93fc751efa7221d8a8eea06226a11e77f6ff00571e314d592731edc6425e49. 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/HKE022258004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d18df6a77fbb33e9b3f4ce2f73578cdc0bfcc4fc635f8b1827060ccdcf9692. 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/HKE022258005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959030802f3b9747362efcb6e7496912fe97f03f1e756354fc5ade921aff5476. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKE022258006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd26252de32dacbef5f58070324c13f75e8ad9d44294a2ddbdcfc17496b4b2d. 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/HKE022258007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0c3fbc48d6ba64a133b4260450b902134ea993f18d15e08257e922e309b9bd. 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/HKE022258008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b45b10526abcc5e80088a18f4d276fe89e2e9b4450422172d7543776acad99d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/HKE022258009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a920a71640fa684186dfee26ec05147abf6cbbcd4a23cc55d86204db0041ec. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/CNUM72400284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7568f814ed9c3aa92e8462541ce70b8b2551ed02445a0c73a6c89c5f879913e. 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/CNUM72400285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3114c61746934b942afe8187cb22a200d292e642f25c37c5bedf61d69e178c2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CNUM72400296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf317158393b25134fd12d9b5825a5b54077913e5b8df21dd074c4d05a32f4552. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/CNUM72400297.