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 0xd4b4a020c571ba1bcbfc9472acef1ac844a19e0f81c156eb5aaaaf50077eef28. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9af515bb-c5a5-41f3-8f6a-f5f29e9d397f.json and https://artists.proofprofile.net/proofs/artist/9af515bb-c5a5-41f3-8f6a-f5f29e9d397f.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 0xbb8e04123c2ce10335be6cb4e0a0ecabe8391e73909a02a51e7cc8ea41441cb0. 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/CH6541652629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c5e731a0c744c12ed27f64df52eefb604f1a9f72e92ded14844f14f6014edd. 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/CH6541652630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ea4ade0ed44ed301602c9f702c9eee3846f6b43de90d21fc5ed34031996dc9. 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/CH6541652632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82aeab63b36c2ee547bc171a2ea5897b95b55e4e1239c5ceff0e384f44ed3d73. 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/CH6541652633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56baf8932506269631d28dd9d8dc8cc99f14d3f21ecfc70e713a63462eaafce. 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/CH6541652636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf43eea169ae352862691ef792693603dad685e14b9646aba1885fed3126776a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CH6541652631.
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 0x230ac06d2ca0c3e30cd9bbe255653b93251ff3cc4d68f949b7060f5c27e56531. 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/CH6541652635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a824ef583e513aea390e8f53fa2246fd3b8d83743a7ac3eca1dd1cc028ef3f1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CH6541652638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5064a55490285438c7dde61a477d7daf7c700c725d43b0f01299c5d682d50eb8. 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/CH6541644875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ab1c58ca7205d54b76ff7bdc25d7c59ab20aea7e6c3da089619b345e6b79d8. 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/CH6541644876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd880400b7b4fae25ca2b0498a53b1ca3ec79d3de6c938622dcbc2d66c0c3641a. 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/CH6541644877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b6c9e851f3202d933e991bf5fa578017d7bb49f83e3ba5484c3106d5f4f2ef. 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/CH6541644878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa05145d44e206ebef0c815049522332497321a96834d08c78b042d3fd93f687. 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/CH6541645370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6278082b31b56be1c47400dfbb27a5f6ceabfff1aa5301565768a773e847aa7. 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/CH6541645372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c65aedd0626c21de6e1e1b487ad8c12962c47c92cb989ba6a4e139222b23abe. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:21:18Z), 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/CH6541645374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537ec5289efa6513d97537bcfaa92852ebd983780621751b01604860e3a64c08. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CH6541645369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa187a77c9d8333b2210fbcffa460ca5d92bbb5fbdf3a5f675a22e59cb644f7df. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH6541645373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04930140240ddad6fb8fc700678d33562e47a00e4b3a880baa777dc5ff72145. 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/CH6542075605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dbcd2c981590407c0646ee6149b88b499ed46d44f93356b475568d41a661882. 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/CH6542075606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1db4beb2e75422ab496a9ce71f3e26234a36ce0d8e4f05a03cd851987b08a41. 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/CH6542075607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647ccd20ea34d6d5b7cb84425469a12e682bd92fb2a70a799aad5c76aefb1521. 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/CH6542075608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d454866c934773a2f068c1ff5b9bd29a330a32f7da7e50fd566ecfbcf42839. 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/CH6542075623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fca13c79548eeb0417543bcda762adef9e56f4217d177e9af8ab5b446ee2bd. 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/CH6542075625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd39cb747a7c7b1d5492bfffb9b1d9afa1982f9d49c61b19703110b542064fe. 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/CH6542075626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6872534436d85b709a63193450c6f1657fb3b9b42d8d44bc24831c07d2e4512b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CH6542075609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb656ce38ec169d45d0d6033c9c4195f614a8c897401fcb497df9406035b96e7. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/CH6542075610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f88093685957f52031c9d7a4693cdb670fa5a227ddb13c6b49cde913ab4d90. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CH6542075611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5162a1eb0849bcfac55903a7577184e4f21a548243345434f03b7c4de811ce7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CH6542075624.