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 0xe53da0d18cbf1070c36e31565c6bb18bc33e176a5a7eadfc29af66f6f021a6e4. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffca9978-8901-414b-b7af-fc2ad0a38877.json and https://artists.proofprofile.net/proofs/artist/ffca9978-8901-414b-b7af-fc2ad0a38877.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 0x72b6cccf58bb4845eadcaaeca00eac7cbcbacac08ca5ae3f741c752705456b8d. 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/GX8LE2486797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10ef0c8bfcfd7e6f511c2b32b39dde52ba4bb40e4f299f2cdda934c688ca7a3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX8LE2440991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721982f7a11f74278be115da84272816b30e80f5fbfa3b10f8b770bcc20cd3d5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:51:10Z), 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/GX8LE2465445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036395a97c0bf66726983c55f3833f4a8d4fd89f195854bf3646470326dd3eff. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:22:47Z), 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/GX8LE2433662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a88cb8bd285119cb45e1ed068b4b61e767bb9e0c67361718a83634104383a6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX8LE2442202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812ff30047153099488ca08b989adb148d1222cf6897c00879ae426ae20ac1a4. 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/GX8LD2556029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83ab02db4969444e9dc1d2cd61c95ffc613e0b05e3a402a3abc94c05123bd6c. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:08Z), 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/GX8LD2588463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2353fb1f39eb4f657d13da7d3217e1740de0e0ba013741d19223a040d6af54. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX8LD2533896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b93c8bce980da4fd6cdfcbedae170a56013b36a7c6f92eddc7ac06fe2d88b3. 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/GX8LD2562640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf867b06320b02af491f99bfc7bfb5090ba346541ea164580c1f1c9a925f7a715. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX8LD2511513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebbff066a6c507a397f164ef508015ce991db0897e1bb442c25936b1f8cf873. 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/GX8LD2547914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077a4e73786484d70814d130485290d40fed0326bd128a91d255eff6c8d1c1e9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:07:07Z), 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/GX8LD2598226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536dea3d71101a1a8191b90e105c6d980293d23770a0270db90ec08f2d24fd29. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:41Z), 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/GX8LD2588056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b8171ca63bbefea1009f8179e88ff4ae9966756fef1337f57bde858c699790. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/GX8LD2576355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d1feb578672e62751c2a0795b2d18999822b83c7d778ac32c23b61f9b2f60e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:50:45Z), 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/GX8LD2547611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab46d041b175cd0431ad214f4d1daf7bc27c01ae0c6f8deebd44925dca4b99a. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:44:27Z), 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/GX5MX2576963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb00298196b66cf3c77a7297d78f177b581d1dfe28c8b9ec2afa9447dca2094. 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/GX5MX2566275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b29f00e5a1edd62ff12b2371c2c240dafd08f83fc73272fcf6ae67bb0c01de. 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/GX5MX2515475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f153b377429e74d66078e6807b1967d6d0535b30c11b2d97a0d4db3f20591f. 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/GX5MX2542099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc46d9af63026fd05d264d4cffd035cd20aee0bc7d1e7cbb162cd019ad0ee74. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:04:30Z), 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/GX5MX2561125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc08eb1007c7d6071d4c527e611fa540366b02c59fe9cbbc9d5ff2298bc598f2. 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/GX5MX2593959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b845277ded52c92793bb5111b20d13aebd458964968bd91f48f353e5ea6a4a7. 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/GX5MX2555732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae56497bd56015df98432c6e3e44623dbdf1c78c2e46c86b0168c4fff8fe3f2e. 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/GX5MX2530512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502aade15749c473a42349bf0d7c055e936d6d9b72486ed347c0b65d18cfe7e8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX5MX2503199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1d23347b757f3df5c101a3c9c92a3b30b0a7433a1aecbef7a49c0f79132abf. 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/GX5MX2566191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab90c15a963ead2f2a4f9dd88d47df0234129e5d3a644b9db9de319adcec5c3f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:48:02Z), 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/GX5MX2539042.