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 0xde8270e729086522e3568e7fb48cfa53f4c76cde7bb7758d185e703c58c91fee. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ac3d99b-f621-4eb7-a192-1e126306c6e9.json and https://artists.proofprofile.net/proofs/artist/8ac3d99b-f621-4eb7-a192-1e126306c6e9.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 0x735a318b392c7a7578314ad16d11b2d18fcd488fb4f69c61aadac5697c69c410. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR2X42093751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78ea3c619256d76ed73dc794876bce83351b8c027c91b08b0e16826c00b23df. 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/FRX202290945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c392fda357e68fa110d62eaefe71fdcece300d12c1502c29a5d14e024f5f40. 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/IDA712200554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209cf68ef742058fc35bb09f61580e125c30b662482472157822b1c2b7cbdbeb. 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/HKK972217249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb1c5269e506229cda598c0e7845ac98fa0db8e8a684d686d83abe1f6b4c799. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/HKK972217957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1e859116207b83c69b6e6515c96420030056548715316b06fa4955d2ed0af9. 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/IDA392200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde504b217afdefd8b705964d363aba29566ff24a343a66d316a1e84fb0780848. 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/QZN882283896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64571d964454175cfe259db7155ff63a89a68dca80a605df01d1986eac6ba0cf. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:52:19Z), 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/QZWBE2322165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5550580958f34cc1fd67f8105d431c4dfbdb11d438ffd98f92f1577911cd41. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWBE2334043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b7f34d54d234081d78d8f741804b66572df8492c811e0cd123b4b92ebe0ae8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZYHM2303635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba83cbfaa62af8963634f77d62320d0b94de01831fb1c41c28a462b36562199d. 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/QZYHM2416121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e64823caf2fed99a08d91da25416acc9b4f68af109c2b80af480766b9b4b56. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZYHM2426079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edb023d75b7a803ee485384dbc140a35d007607112c31030438d104db198338. 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/QZYHM2429243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46441b0f3550e5f4259580752d80e93e62df3c16cc76587662f4ebcb024a7ce. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZYHM2429527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769719ce56774d133d4a7f31701cef4d111bfcc736c3884e91cf9e3b12ab012a. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:39:44Z), 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/QZYHM2504094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303c6eb07c5e5c95059dd018f2ecc987a1a9734f40c6a15b0feb8bd68cf5c97f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:22:24Z), 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/QM7282548758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed9747466765a6b53e1d66998154047a7c1308330435e3bcf8e169ce39a2b3b. 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/QMDA72519723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2d7f2afd8798344c518c77d655b67659c2720b733e78fcc059555054fdc0dd. 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/QMDA72526707.