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 0xdf8a34f2ccf547982be8edc66bee9f9e195c056b2fe0ce587e8ceee89195edc6. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3321a210-40cc-4966-a20b-f6ffa80185fd.json and https://artists.proofprofile.net/proofs/artist/3321a210-40cc-4966-a20b-f6ffa80185fd.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 0x1faa1c6cff4f8a47fa7b55c8dafd34dbbd77530c630d7d9b54a06d2205f570c4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ7T2445591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d19356e984155f19205da9cf83c919d5166028eefcb1d1dcaf95615ba264d0. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZZ7X2456199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5deab2d1350277b08420c169c1b1bb7d31cbde757844b84434ca259a520c5818. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ7X2456208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56750565a09a845e7672d23a49bd4a863a6d7263579fa1eb026c902872bc21bb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZZ7X2461519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9a5c4679c59e97f13e3fa09ead4c6fafce02ec09db8dcb13557009ab379bf5. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZK6P2210423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d19356e984155f19205da9cf83c919d5166028eefcb1d1dcaf95615ba264d0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7X2456199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1faa1c6cff4f8a47fa7b55c8dafd34dbbd77530c630d7d9b54a06d2205f570c4. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZZ7T2445591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cfacb156068eea8f9034c0cfcc23d7bca133dfdee171cbc399da1cc98dbf73. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7X2461520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f2535536c9d32bf0b53133cef3c83909e044636a850ed879e6e45133aec448. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZTBB2310880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb0f7eb711121bfb02bf46c2ae16d7cdbdce550b7459480b36b7e73beadec14. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:10:39Z), 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/QZZ7X2461521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf40383e45eb8a709e41b70e1c1a889e9abe8a9227f2b58bd2261ec7a6f7e465. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTBB2310976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b437719992fd26c9d8ad49958fd535528575bbfa5cc6e8160df400e4a1d62e. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZK6F2567950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684bbd814e390e14997fa091991c2c96f9f33453ae7159132b3ec72a270d356c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWFT2551199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3996c1e2250f0bd7473aaea9db418af76b08acf745d45d93311a8249a20d5495. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:41:20Z), 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/QT3F52527557.