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 0xaf2bb64c4b4dd308630142335827816758d8af71ced3942dfe0374e75798f75b. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ec3a6cf-e601-4bba-93cb-1a23774ea14d.json and https://artists.proofprofile.net/proofs/artist/7ec3a6cf-e601-4bba-93cb-1a23774ea14d.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 0xd3b3efe8484c9cbffc04fbb8727069a4a1a081ad14c2bd1170b55c9b5db844ee. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPU901402136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8928d71fc3f0ba707899506ceebe2042f26ead0ded065255f9c9474336f71cad. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPU901402138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527c5aed2bc84a655b7942e6f3d2d80f2f7cc7755bc14681dc079406afd78216. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/JPU901402142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc1b3cfb6dec4c11b5c3ddad58732889e8cf79351131cc1316fe8c0b78b2833. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPU901402143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1062224195db826d7c6d2e754bd139d91fe8e0d3d110cbe0240d20f421dd63a2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPU901402147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05cc9ac6ba98e9d93c718db89d394654a21b2a9fbddf8dd96ef8f34eb4c42ed. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPU901402137.
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 0x88acb8c57360e95b621c641d1cb70475e456293c6e7e3f1538dcc5aa80b0a30c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPU901402139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08af20ec350acf7ee1349ddbbef8c317ad666c52fcf402a75e1ab007627bb6cf. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPU901402144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5545a3017f5236bb48178796d3518e864a4b403198b8b4ad1164edf5607f2f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/JPU901402145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edc09f162da7094c4846d7cf045e5efbfcf1fcb2f68bc20de61e5a12f7524b2. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/JPU901402146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724a8b78d6f2ebc5f897a9e1fce80b6f733e5e855055711ec178696d37829189. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/JPU901402148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1316490dd3db6570470b9ce16b7037086a3e27562a91d42b585a8c171cbf914a. 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/JPU901400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87aab319868880f29ea8e694b16b2588efafed5e7c17d6b19891ba719586c1f5. 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/JPU901400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae53a90105fd8ef6830bd973c50f1596ebd667d98628b6d68ba4beacf65aae4. 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/JPU901400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfacdcebc3dc63d1dba9845beec32fbb24dea8a51100506f6295e9a724d049b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPU901400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfd5f505fa581258fb378d7608fb0ad69a497eaf488f250f52bec236c0a3190. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPU901400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49b3881fa9705d9e64839cea61dd3da3901a76f1df587997a647e3a68ed3c31. 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/JPU901400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49172e0f7fe895815e25042cb9ad7397daf481aec09253423ef90354e9f190cc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPU901400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ead6fe7203d98a62335640eacd09e556566ba7bc713ea50bbe6c1e5de316d18. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPU901400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa74e88e32591c6e83c2270da296ed73027540683229dbebbf1e2cabf3370483. 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/JPU901400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33202292bb1cb7c16d3ac38d378b1afc79450e35276f506a8b27b2802b07e0f. 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/JPU901400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e2cd7969f237f2cb44b2406fb5221adb96d872c65372f1a4c207c43accfbd0. 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/JPU901400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b240309dc58ddd803a2430e7aa495aa18607bd57fb42baf2d2366f0dbaec355. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/JPU901400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2183db7e383131b3a61673183a31249c9b36f67b2bde5855fd17a35c89d99132. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPU901400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857a8e935b1d3fb31d1e1a9862a2a3265a7d3fe3db2c93270ae60447eeb8f180. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPU901400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cfe6114214999abcb0b1468d1420ed2e76e1b860816b26af95b898c06ba0f2. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPU901400017.