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 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 0x5adab72b4753f3527cb73ee3325e658cd1d17a451b13e5298e060ab6e510d990. 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/f6f84ec3-6b79-4852-b613-78cf2ac3eeb7.json and https://artists.proofprofile.net/proofs/artist/f6f84ec3-6b79-4852-b613-78cf2ac3eeb7.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 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 0xd27f610536a65b74e042e3af7a70f1a58fcf0cd5b7e08d94d5edff85ee5209a0. 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/QZES52177931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef3f20493d56328dff4333f3cd38dc9881a3dc9d684e7f29c302c160d5f9b73. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USANG2298056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f211648cf8bcff9b1307e76e8489ce4126f02470785477f781b7eca40eb1d93. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/US3DF2459257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dea9ec9838d9df77620bb8d05ca9859ba49e61db6367cf65f871fa43554f197. 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/USANG2412477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89b6abadc89b64351614b69c504cda111543d765d174ad49d819d352a8d8b10. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/UKZGC2408614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa005aab148eff722e86f51df79934edb72e33752ef6aabc1baf2021fa0daaece. 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/QZZ772412904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b48129804da1638e72946d0526b0fb6cdd70e4319e89f6e28b347e5cfa6be26. 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/UKZGC2410524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9190aed4c1a056feaed4afff870ed1396bcf8fb3806c1737d1c042d1cf0071a7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/UKZGC2411139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e778cc1db3b7f592fbab6d57bc76ef9189287995f9338580419af14f0df6e4. 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/US3DF2541689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bef5e66fb670bca4221bf4518771f3dc794d39659bcafb42f6cfee1cc594c9. 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/GX4R52518630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400157e54edb544984ebf720cd7899bc82789b60d28c529635b3c4cb6aa36ba1. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GX4R52502563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04d652410d6767d36979fdd657eacc50885e58f2ad88d9e8aca08fcee7a62c8. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/GX4R52579944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75740d066fc7eec8fef9c90ef91368342336ef5d8bcb59dae138154050998fd8. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/GX4R52552827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6ee56f1711a39c7a893d889ccd3b0fce3007b1b7059165c1652a3cd53b1732. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GX4R52539199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d62d35121cf648e6f65bd7ba79e6ae1dac972b778b61f422d11ba927d3adf5. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GX4R52521004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa797ee8eb9046f84e3c4ad98d769611cf39c76031f17724fc5c39973a8b2e54f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZGC2407352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15da8a49a93687dd0ac334ac8a409e35eba9872e29982bbf87d66e9f5cbfa96c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/UKZGC2404366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e282f1bdddb346075f89494829f8165c80986bff8851c6b7eaa8f4ee07d6b2. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QM3DF2280071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f15f70b2b14bc5d2d5362cade32aaab7a039c5a5994b50925e40cc5c7722fd0. 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/QMANG2239590.
Trick or Treat: Spooky Paws on Halloween
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7c39c59c00a3c14a77859609bb8eec107f4167cefb1f0e6ddacdc496b043b6. 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/QMANG2215264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110f78d343e86593ab3911dbdb88cf66397ade1d2da02d12ae23aba5c166cb25. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/US3DF2469835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9190aed4c1a056feaed4afff870ed1396bcf8fb3806c1737d1c042d1cf0071a7. 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/UKZGC2411139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b48129804da1638e72946d0526b0fb6cdd70e4319e89f6e28b347e5cfa6be26. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZGC2410524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1649957d5d3a0135c1b725e410415ff8c12266028c5bd289263d95f7cdc1f71f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKZGC2408855.