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 0x9618c31825d7b45e24a90f71b7ba74d0c27b013cb86381ca20bc9c96f8c5d2c3. 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/068ee684-21e8-4b85-91d6-2c333f784f65.json and https://artists.proofprofile.net/proofs/artist/068ee684-21e8-4b85-91d6-2c333f784f65.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 0xd8e4614cd605c507862b26f1d07c331df7617f7849e12e0185f4b9c6ee68382c. 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/TWA559703009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9722aa439979d22f310416030f0161927fbb2b4eb91b12e0b74df8dda49d7cdf. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TWA559703010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829e880338a2eb4382261614eba83ec8b54f3abc0da79dcdcc25ecee37512f90. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/TWA559763201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706bd957a86d60011077d60fbd0f28bfbc494a0ef6027be822f3cc1cdb03d4f5. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/TWA559763203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8320a9c53ada6e4b3dcbcf82c53451c1d7bf3772324cd0e63d83b0fbf0a2939. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TWA559763206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc2dc6b766f93d536178ed11f3224c00406540e0b611052ca4e5444b87d540e. 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/TWA559763209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee4b526277c04cc464eb79f04751b2006f1f370f655d63a17d26c9bc8557a0a. 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/TWA559863102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83626b60d4e11c6da6596e9b3634e66ce686b37d16388deca39379b8886eef25. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TWA559863103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a6ad90156dcd2fc0dbe9cf3cb3aef2c859ba39039e320100a1e00165d403bd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TWA559863201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0b0e9e55dd9a5707f66a9bf32090b9244ff190a7a45be59f6a9ccb5acd297c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TWA559863203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe512f2f0dfb7d99519d4709d5e9d9dd8f924ead97ec7b9b650c21710eee0bc48. 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/TWA559863207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bc32993fa245eac9ff86c69f0df95cdaf177e714dd48c14e612cdec759b463. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TWA559762203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4120ed8b3a66936662f835148abebd8a26529d1aa2199018ae7a7b0b494ac63. 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/TWA559703012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819f1f174909789a07bd7485e6eabdcaa202c5ede0f63e6390b3b12e1bbea777. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TWA559703002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5d32a4746031bac74335c5b31c1f6feb7c0e6c77b4a3c8417b9af05bb7a264. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/HKG732155753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412828240143a441e2d966e5412a03f123a2898957c155c5f02bf7cdcbab33d1. 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/HKG732155758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bc32993fa245eac9ff86c69f0df95cdaf177e714dd48c14e612cdec759b463. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TWA559762203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62320b0af091e24ee43f05ae517e5abdb5ef03cf6d66c252856b3ae2ac7423e1. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TWCT52323981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4120ed8b3a66936662f835148abebd8a26529d1aa2199018ae7a7b0b494ac63. 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/TWA559703012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bc32993fa245eac9ff86c69f0df95cdaf177e714dd48c14e612cdec759b463. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/TWA559762203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819f1f174909789a07bd7485e6eabdcaa202c5ede0f63e6390b3b12e1bbea777. 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/TWA559703002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f3961b52c41f2d1bc3daad66a946302c787c449c4ecbf1854b778dbc4e3aac. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/TWA559612013.