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 0x0bfe1840fbdd6159b7148b3199f9858b44ec038cb3a2fe088f475ae1c06fb0a1. 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/688c8d8a-832d-4851-812a-b7047e1816b6.json and https://artists.proofprofile.net/proofs/artist/688c8d8a-832d-4851-812a-b7047e1816b6.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 0x976f7b1d896237a87549a20f11e44e2956ed0908aa33948b779e00b0b3e16dfa. 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/QZMER2179180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa20bedb4838b9d11e59f3cfae6140cfdbf1f0cbc38f4d3ca0c25f92a1e30a3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:19:52Z), 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/QZHN82154090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca88c83bcbe76b966e9b42a13168b218c900ea5028b8e87df5a48246686ce78. 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/QZMEM2151401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d6af7203a60eae0300168c359a031f95b51fc72b1a31bae4d5f2f47e84e22b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZMEM2151402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe38a37a960e9964801d0be9f2d4ab0acdf207cc6da52fa8cc20a08c5fd79f45. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZMEM2151405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb40e16a57cbc072159e4958cb5037d4f3bb5f98516cde2960fa6115f3eed129. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZFYY2120784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaeba799deb835ebce0d7f5933f0d27d03be4fd2e52cac2ad773dae8af997bf3. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZFYY2120786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1e4913a76c09cb3898d7560e17b3c9767507f8f743f8f28d179efb583d19e2. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZFYY2120787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b7b7daa055abfb2921aea3e32561eb5113cbf17478453c67ee63c662658970. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFYY2120789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aac33afad9bb3ffc7aaa9aa4c0a05b0b1f607c2c0a711d268bd0ba7efbc0e7e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:52:23Z), 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/QZFYY2120790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34aff9b85f9111adc18d5a9769521a106d4a29912d788c95ddef5920e0d221a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:38:36Z), 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/QZMEM2153345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de2b43496e8011a72d31937387c772fe0730336d95da5341f07c2098805b3c4. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZMEM2153346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a32cb6b7e65899655993d3a034418a5928d79c138751e22e5330c19094f94eb. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZMEM2153347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8867b8f7799f9679fabc721ca29868046467e495e022dff83f048b4ad1a7188. 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/QZMEN2154443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9540ad8735e7db45a007894e8150bf89de49fa524ad1e99efb0b0233ab1bde2. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZMEN2154444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf969c70a052fe8d3ca8e6c60fb972110be7a7864b448da6fcc08ee8701b3262c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZMEN2154445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4be17bb395a3b77104e979bd392468896f497cc02196e9f72de1d409cbccf56. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMEN2154446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2526c758ffc7f6210ae131863f23235e69faa6673a8d39f7062eb4a74234f64. 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/QZES62218117.