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 0xa68be11274fe818c5510d9ec535aca6c7d5160b5ee8ccab4b0e7b93a0d152399. 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/0ec38ef0-8072-42c9-9eb2-d12b62409bb6.json and https://artists.proofprofile.net/proofs/artist/0ec38ef0-8072-42c9-9eb2-d12b62409bb6.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 0xa1b957371a66b518d626c029ce883105f4f7a7ac7dbfdee4d1ead85d7b99edf1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CHF032500236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bde92322f2d9d671f80cbee45fc5d549b3e45ac2d82ac91e629e0ac857e3b6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CHF032507142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe35667a2fa9312575ca3eaceacb8b8157db902b07c27edd2e7d0422f50e350. 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/FR2X42213953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d9d7789596cba1e8c9094224f07b83b73fe729fb5e89dfc1c76d74f1f54216. 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/CHF032420674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d24c1d85bbd815715bf470934ec7de5b720bc886a7352b37d4fe5251624058. 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/CHF032420675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66493ba5d1a58f518e0d5d0c4a19bc625818df4ac1b391af4506c632962dcf3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CHF032420676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e743725dd6422e3cf675c3aa82e20c8f73605e38a9a46c8a7809e60ac3c833. 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/CHF032420677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659274f053bec181cf87ee4cd1a6ab2e3d2526b7504de95d5741794976b22e29. 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/CHF032418848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3000ef5c5214c1e8b6bf2a12f3a4ab4ac81a9867e3deef79bd7f55d683456635. 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/CHF032420679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97164013cdc0e7974d890f41c1307c32c703fc227a7f2a7408e171cccc963cc9. 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/CHF032420680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddb844c9169f4738b4ea12e6ce2a3e81e9219f36fd52175de7b34e06940d7ee. 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/CHF032420681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6238b5b312b6dcccd72e4c3b3bd585de8ecad982c2469e101ba28df72aff2f. 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/CHF032420683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2966d65feb5d5650e366a1130b6277c4963346cef4473a2bcab444d0af6ce8. 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/CHF032420684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafef350638d191382f76d92b8eed8469f586a22fe9b12b2c5b9375d12c6983ca. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX282531132.