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 0x04f942a2ba50655ec782733cb6a6731c26e249aa16c1c34eaf48ff54ea2de868. 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/d5eb8795-d4ae-44c8-a4d2-9bb13f53a428.json and https://artists.proofprofile.net/proofs/artist/d5eb8795-d4ae-44c8-a4d2-9bb13f53a428.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 0xed53f93aed425199db2760da5e3127d14677c4ccf672df2fd69f232b8df699ab. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:37:48Z), 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/QZTAT2113690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7012f2620ce1b0445eeceb75cc13346808c6c6f4694271a6d2132cad87fe05c. 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/QZTAT2113693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9cc700b7e7c7c6679f6f6d9f0921cb1d575a2ba55204a8362da2e8ca89f714. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:37:43Z), 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/QZHN52206441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fb68f8fa1fb70f7dd0cf2f27ca054877ade9a39c5ba8dac46c3cea4027ff7a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZMER2218402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dcb44c485f24c875d188065bffbc1c1fe252a45cc1d2a1df7f1e6cffa852cb. 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/QZHN52301229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc238e132e596f1c11d023508e469d253b1d63a8c971312d8d5c662b2cd1fc2c7. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZK6F2346868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c62aad7b92558c42207adbd879777057853c2f0a9d6078bc8ddd84e54d735d1. 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/QZES62456123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986e43e08417251b1d9c674dd7c2569b1b03830dd93f28b8687112e76eec1fcc. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZK6G2488468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc110e12f18203263f9f0976611f847bc2fac081478bba7687ef426d7f73b48d8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZTB42467976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a02171b2e16a9858d77f81a9250d8fd73b7e0ef88e6d18e7e705ccf60aa271. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZZ792409588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5417d270991dffd672f7095f5b66b377db5c3ccb8e171b4a268cfaab9f19969. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:51Z), 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/QZZ792409589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84f746183182c8285b86f942b1a5a1b5f9add8e4cc9769e87914753a97f34bb. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZES52517975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553553fe864c9ecaa340578aa2142af7f427695c4f375df04891f2192a306699. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZFZ32519248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33c519cc4ec2dc3b18afc5a588b78bd4eae637666e686124395bcee38b5a453. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ32519249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b0bce346feef35c498095b4ae91f074bc960e7b693b3cd6c0a34c37829759b. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZHN32538371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8b93d128248f1314770ae89f49d12f5f16cfcf6c0ac7bddae7d85bd6e00f63. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN32538372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84f746183182c8285b86f942b1a5a1b5f9add8e4cc9769e87914753a97f34bb. 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/QZES52517975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28d6fe7363d526c9bee1e988a5d2853baedb17e944c7ecb335614015e514837. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT4K32525363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b37c89732b6782a45e52e462372a61831ddb86fa6b350007daa07d6a0e7f96. 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/QT4K32571349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4eebeaf0bc33b53649ab7e3c852bb4f31a34911fa87cf12058c05369ecd578. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZRP52539751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cd763d6e44e912041d94ab3bfda98921afee9062decc3cbddf44022278866e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:37:38Z), 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/QZTAT2531582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4217d40ef955ce44394fe71addd6a4282575b6182852c9a3a955c32766911147. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTB32568694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda83dce9b8169ffccd1d1fcc711ad99272b8aee12ed8dd64bc25c955fd99fa7. 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/QZWFJ2514277.