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 0xb0b28ef07104a4484fa62c1186e61eb8c16604681416d7303bd4e5af8e35e04f. 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/d9bc0064-378b-4494-911a-bd8565869829.json and https://artists.proofprofile.net/proofs/artist/d9bc0064-378b-4494-911a-bd8565869829.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 0x91816aedec1ff93cfbe91eb3e2a3dbb58b03b515324a7596972529ee7091cc24. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBCFB1700149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43316df4d8b9aa5fd69976b0fe4b6543aedb11383f13503ebd95d2874cba37de. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/GBCFB1700125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b407f293f1d49bfb9170e49d62855380c9a51ddcc0fc20ddea58342c11a18fb. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/GBCFB1700126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e78e68cad1ab611373ff919af6fdb94c1aaa7ca10684dad93ee9349e1d9e49. 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/IEBAE2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e927b53f968784de749cf08cb753333c4d9ca32784b3aaeece6e4d371a9c891. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/IEBAE2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15d0df8d11ea50e919131e086611a49f285c135b5bfd4fe63d2a3a214db5b04. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/IEBAE2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa3ba9835e85f1c9e594f682494c42210230fda2d4e8405691a52a8c7cddcf4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/IEBAE2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecda1d3814f41e31986b7f71d34b7e7e5988e4d87b6371cc9e82a04de8dc3d41. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/IEBAE2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb01ae5bc1bb35433453c29e8ce0b59f7666c97ed0a479447cd5de32c336db99. 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/IEBAE2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e19021abbf2f8340f38dc9aad2ae95023114c53ad304b853e9a0e2eb94ff9f2. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/IEBAE2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7362570ba316a70595410cc46e0f1969d0238725161d48f12f762931049fa580. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:59:19Z), 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/IEBAE2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf0b98319bd1c8547f653d4272da1b6e8daa44b56ba702f6d14458c627a8520. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/IEBAE2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74229547f917d7fbd124c3f8f5f11c304f157a8b23f5a96f7af2200013cdc705. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/IEBAE2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc1b3abc8cb5fe946955afb4b464d4cdf0636c1ead51f431d17f58b03c928e8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/IEBAE2500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bc0d14f2dc193b52056afbbddb7652b6278361e19228315184bbea068b3ccf. 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/IEBAE2500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded11445453b130201a95387a003a1b5ea232d5c5920b6f13acb87c6c8856077. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/IEBAE2500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2008d73bb5c3668a2b1402a3f3f5f1f1f9d0898d7decdf51009aa8016306ac6. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/IEBAE2500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc71cadcb22c86e62438466897ac92ebe3e494b6603d6651ecea2d4f156e0aca. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:45:01Z), 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/IEBAE2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5f28b34c12ccdb3d88f492d6b56bae3f28a43b4f602d410daae5a76fd3890b. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/IEBAE2500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4299951615225bb966302dd88629652d52a3f5718936709a9fd9ee6df4b8589. 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/IEBAE2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d133b32de6d08df2eefa2da8fe8966f378999a67b5ca7e58127ad1914c2419. 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/IEBAE2500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0e671ca6b70fb8c2e53600529f8b541107b383d66392ca29eda5abbe906124. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:50:58Z), 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/IEBAE2500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7c015fcc92aa3f6d5f2aa9e39f609981f5bb7f621b6624d3a5bf732c9e0a28. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/IEBAE2500036.