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 0x8395d8637382be15cd48bc4adc4e956caef0165cbee34aa6300553ecd70ec021. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c361121c-ca7b-41b8-aab4-2d917c586e0b.json and https://artists.proofprofile.net/proofs/artist/c361121c-ca7b-41b8-aab4-2d917c586e0b.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 0x1c9f9211f7570403225f73cc42e52b435060a4788231df41edd080dc3b224793. 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/QZNRS2059293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171d29d9a58c4e24ed220b4aef193074b5dbfa2a5a2cff217315354c24be5312. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6F2269002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822dd647f9b344a1adf8b1e3d33ce5357040611771ae3204a36e9a7409cab99e. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZFZ42326455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35df978c806c26556f5fd808f25da79ec4b1a9b3e4ede43d386765e7975a9c65. 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/QZES62387776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ac21d67b9107ced967c0ee82a256e5468cc28fbf1cf1b905e164eb6383739d. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZPLS2246442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33e8dba0ecc56336b707dd6de0e9ba91e5a958f91975478d29f5371d330843b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:53:04Z), 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/QZNWS2345762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b42fe4c5fa445214e7a77d79e49800074410d67fc215660ab359a0ec288798. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZWFN2362546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7eab8b2c27327fc2118536364b0139c173bbe73bc2701df7947b6410fefd98. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWFN2362547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb467b08f34c50a8e1947507a1f00c8d2ef34abf427ad9c0d4e0509db6f6364a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFN2362548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ee5eb5144ab4cfacaf72ec52e96233b0538141471881fcf866b457f9f04579. 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/QZWFN2362551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fdefe5782d02696055d6600cf6efb5bc534717b4fa8c020d84ed3b7236bd00. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ72409725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e6c233a1d7022210e74ee6083367ec1b07138d982bc52236ad9537639061b5. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:04:14Z), 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/QZTAW2401283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3b7847e8e8e3550098404df177bb5fbb405f2fa3c4ceaacb963a9a01cd238d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAW2401285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cdd3fd21a5444566f3f6f4cb964f6bcb41ae8b3fc8a57f10abcc5204fb3f66. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZZ7N2459600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7defe20ee4b8db2e71a2251145725e146c936398bfe75ed0f1653ca20261d962. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:45:19Z), 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/QZNWQ2522415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622ef65934630033311c12ff07b2e008988aa77d1481c030ae40d2b8762155d6. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:32:17Z), 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/QZNWQ2522416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b95b7353d65082653f4bbc18e966d546116787f721b57f1f31d40bc642e79b9. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZNWQ2522417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32954ff47f2c6381dfc7fa7b9db99192267764141517aeb3b94788a38bd54a21. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTB22543775.