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 0x1af93eda0e21194538d01ee57aca08c58013a50a1a34d7085d628a2eca83c965. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4952deef-b76b-4b78-8c4c-bf68d66012f2.json and https://artists.proofprofile.net/proofs/artist/4952deef-b76b-4b78-8c4c-bf68d66012f2.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 0x6f3a602b5f667f0dcccd0b298fa2c5465554d5f1116ffbdd62f001703292a934. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZFZ62544457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5052e5d3f2753b5ae2b7a5c13c279f84fc2ac7f529b66b87770d08bd14267b82. 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/QZFZ72565436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3beb401680eb3780fb31e058739cb94c2ea44190dd3d34cdd87b7e51c14fcb2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDA42516372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaaac1c58af7ec212425a2cb7896c27390f3d519984cbd36a4dd6602fb258603. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZDA62578488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc4e5f977be270b2e5d19755ad7cdf2cbba8ff502f4ee2cdc68d3f2a6e62ac2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZES52526181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ebf1f3b1404be11bea50a1e947c17144f858e03536d8a25c2f83f911e3d637. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:19Z), 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/QZES82524686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48203c9b6abe4f4ba8710ee2bbc083405ca6a4532229b60ba8040d2526fd0dbd. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZDA62527893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bddce5b4c6e2d79b9e25f06f4f46f16585d44297368286748c394fb4a5bc56f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZHN32524316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf3a3cfcf518ac533eccf437d87cccab91c4d7dd57a515057b710dfb657feec. 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/QZDA42580364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8507bf9df1851992a31a5b8548bd3ec75dff880ef2a36cc36edf6461bf9a07. 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/QZHN52571202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a0a3ab64a5f228cb9fdf6e7f9346734e82b3506a9cfa72d7a9b55fe98d5adc. 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/QZHN52572372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33261eee746f50ac6f258c383f7422118a0cd06a553a87c9f5e9ffc500c788da. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZHNA2545795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecaf7ffb9f896630942d4b7d8ac664e3c853001420b815f84554fbd27df25857. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:00:04Z), 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/QZHNA2591974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba56564e492745714d49b6cf8f316afa5959d922b2ad9c9e8e9c5b4b3bd6f37. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZK6N2592514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf562cad5736a7bcee3897638f6840ad65a83639a34f3dbef02b446698ffadb5. 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/QZK6N2590056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1b8dd660183ed559193ba1a4b3fb6522e2e4cce0866d907980ea5ff7f1641b. 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/QZZ7L2509991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a9ff41a86b9e75b52c7a3692663c268107578a9d04aa73b0cf4a21d22a8f50. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7T2566013.