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 0xd788c9e1f1d2441d73bc805c138de3ec68f8feb7f3f41fb1df4c01e087da2ee3. 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/b87864bb-5c50-4d5d-9bec-330b32be1e87.json and https://artists.proofprofile.net/proofs/artist/b87864bb-5c50-4d5d-9bec-330b32be1e87.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 0xdbd44d674e5e348910db35c1a301eb4c0c1777aa7f47dfdd74f7bfa63d76b99e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/IDA141600185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d6774fb8268617df11915ec99a0f71d11ce1aa6bdccb47090bd2a6947821e2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/IDA141600187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d4ebe2d27e327c26ab65762bb0247efb34f6c03a75d365bdbcaaeb431c6751. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IDA141600192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d72faf5a719f4c2182f49114122851e656060f9d7887e8593d51979e92fe36. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/IDA041776149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3318f246504822da47479c487446b3c82751f6f85c9d0985ade4d58abea78f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/IDA041776153.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41273a13149e2bd6ffa0427255ae0d88b8eafe141a54832776fe7d52e68fe661. 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/IDA041776155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2a71588457a810941ee0f1bb22fd6661823537ab97a037c015d87e05d47760. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/IDA041776156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88999b952b04d4a8db50329732b1ae6165834b72ca9d9145d88262cd7181edbe. 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/IDA662001099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa389930a391783c80a9981cbf79ef340baeacd8f40e880adddae5dc7e05fbc1b. 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/IDA662001100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78d3a497ff94801fb2ffd9b1b14223c1ae2982f1364f3f4225eb4043e7ac6d7. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/IDA662001101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175d761604071d374709707caf7b45e035ef997f1dc7449670c26e8d4e3c00d6. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/IDA662001102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e47d559d015cd3606ddfc430d284c6e55daf19553b172984d249583886bee8. 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/IDA662001103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63a3299aa20a0aae086651183b16589b42636ba490583a408e38071bd6b8444. 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/IDA662001104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cfe9d42650d785ea01714e5b073f5f6717ff4ebe919d335f3fcfdae86b09d8. 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/IDA662001105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcbd3c6d58f99de67eee1b93c3e32693a2753bb9283e17b4014bb3d38756ace. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/IDA662001106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe531a514c1622b9cb67605aa3a39a9c118c8058cb0e4de5674eec12848998332. 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/IDA662001107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7ca7be87071e2d7b98f892223db6c578d71644a5e9b4e09b6cebc6506aef93. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/IDA662001108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8439a1b0099411c1647f7b04900b6e5b5773fee62b43acac3d48f077cb745e5e. 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/IDA662001109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b87f3aaa83a4ff9cba22872b6ca0ac7c106f1b395aa55a203d3b7c0327bd962. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/IDA662001110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46177bf4632c0646d68d44b794fb7dd0ed9700bda7adb60a559f92415caf9401. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/IDA662001111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c8a9393eccdb251e0dab1284290379b59feb9848e219e37f49a3be9dbce1e5. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/IDA662001112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb4929e36ed4aa6a9a9950f9ca43c18cb1b4f8142f7a3d466416d190103874c. 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/IDA141401461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f847ecc7e0c1aacfa0b69f416ee6b4b5e2aaef2a442ebce913d8ce73db6151. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/IDA141401464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f3dee41334dd00a3176a378af5213452bd8deb380e6a5d09f14c1f8681a7f1. 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/IDA141401465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925ee86fcea68d4106e52747b7dc0688fce8d4f68572636ea87e8848545d71d8. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/IDA141401466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262554301a652dfe9e57bc5b56f6201cf1efc84701d1f181477266cdb489b209. 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/IDA662001087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f07470032a3b57d2d174f2d96dbb21c7051786ea98f048e60f4d9e838f666e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/IDA662001090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f14d2b9b6974e816bafac0669cf277a21c8219ffa3b7e7852aa8c3e29891ff3. 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/IDA662001092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec89f3b24b35d00e4d0713d5ea94df27bb5093076591592c0a7e1263ad438e3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/IDA662001093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e1d17fe69302a80f6cb441d21016a8692fefe5a1e5f362bbfc731a796b5a90. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/IDA662001094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e274f8e8957fed39a2fa35a37089cfa282ce199ed95cb9d83d04b87565d796. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/IDA662001097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1041c4ab77e1bce793ff7df9eff31780f57a21d1ecc305a48b9f793b16e1d9a. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/IDA662001098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5010953c5564939cdb1624c04008030ad5934b3b837763e507a8551a0865717b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/IDA662201368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645d548284f67246427aeea7ec960c11d35f558fd4b73e6d30941a390335771d. Chain 2 (Bitcoin): anchored in block 957551 (2026-07-11T10:03:47Z), 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/IDA662201553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2104f2a3315ca165c2a1b1512faf1197b179e9e5a5adcd155d452077c30d01. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/IDA662201555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd791b2eb2937166986afd702bbfcaf5032237dd73a2fd8d6c8a952d2ac3b1e91. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/IDA662201560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71ab58c099b866c4ae7824fd97b5a83d04c35d38781643987e014935f554f4a. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/IDA662201561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9417abfa50d68b332d2e12625fec32776fc0db7542ae205bef2503493457ea. 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/IDA662301683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdede527b612f78134a0d4402cdc7cec70066b9b1f5ef9f05a48413d7cca52e9a. 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/IDA662401833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9349891e27eef0090af2d70b607a0a7fd60e1055a7946555d7571064ad574c44. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/IDA662401835.