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 0xc7f11dab03cfa3dc93f0b45f1ad40c795d3db48fb7a56e62cc4a1ad4403e1b4a. 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/8cf31c14-54ea-41ad-99f1-aa96ff938a6b.json and https://artists.proofprofile.net/proofs/artist/8cf31c14-54ea-41ad-99f1-aa96ff938a6b.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 0xf67986e74ed9094c9181e916f38364b2360767a814e98e574f16e42f61503dbf. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCAIO2441068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e13012462f42431ea98fc747d1cb890e503ed76fb81d033c865686cc8e48fa6. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAIP2409067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbd124024b18d536bd78382d2ccac78287d5dd01f636520cbea9fc3d65f0124. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCAIO2409070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a05c91e74a59ab7fcb4a5925acf447214258a05517b74b7854fb90e5c071ab. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAIP2409078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e923b65518d05dd69708ef7137eebafdd2983e8a10396951daa1aa780c6baf5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIO2409081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1663cd7a698148e8c65b7c3460dd0db6346ffb717b0d52bc0d3e23966fdd17. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAIP2409083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c6dc47473210b17c2de8dd764e06590bd2be603a7403c3b132b3fa58dff2a4. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAIP2409085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7079964cf2b250e51b1a28f2702aa6372c9d6919a4c028bd070c90f7f9e9be6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIP2409091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d1b4bfb00539a1bf47ae80e18ef9974b102dc780549ea53dc98c9aeedab9e7. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAIO2409095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3201843fdfbc628c15a625528b267a24253d8d70eb749b7d58e5f5a0f25a47f. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TCAIO2409096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032131a083e59105d008afd3a9b4b82e13bba2eb48dfb6280e38e0698ef93628. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAIO2409098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c4c3c7c4f412c0c63761f9c0bb38d0f9bdbd721f26b5d4f7e1c935499d217d. 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/TCAIP2445520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1644e3e86fba9f98d00366988581c1a869be5c3294dec7bd4c66ca03757ba825. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAIO2445522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548b821b5716de8a9ff18a02f22cccd122e0ec362a8d7b2e2a5836f2bbe962db. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAIP2445528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051c701eea99b87576e66e5392ba47fdb083d4d17622d0a299b45db9d4ee05c9. 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/TCAIP2445530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d4d99b1869161cf253ba89970340132bdcd92424c661f0d3097634e4af79e5. 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/TCAIP2445531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e444399ccf38a21e816c6b0d29fd037c088f5c6b9cd37fefbce58913c57432a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIO2445534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebb5f5654aa1aac562b6d9af749efe15215631973cb2917ef492ccffcff3a25. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/TCAIP2445536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dbb1edc3a95f98ad42680c0e404475d17c9dace7fe76222336f81c4555d1e0. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAIP2445539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b905d5988a0418a817e32862a9c1d874301ae4b23228bcb24d872d1e27f201. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAIR2403394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa5db06f143d3986118cbfa84737bb132593af0cd886f362ab9bbd8b7b3ec46. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCAIQ2490366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe639b1e20d90016a8f5ab224c262a6634a5dcc21d3d7c5f4c124097ea5b3fc25. 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/TCAIR2490371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063cb9fd70c90145996045b6b1cec5ab7112e9c375818336b0af1f1860962c3e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/TCAIR2490390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf37184a6b49fb877e4e7cae88620b5f8da4ff1a6f002d6f5c41eccb12947ec5. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCAIQ2490394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ba0b6ab188927db0d6d50c88c615d28e13f7cf61197e8547bcccb730cc4cf0. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAIR2490396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592e7576bb18aecc3b455698424b13365de99ec74acd166a5998d375c8a7105b. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/TCAIQ2490397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a6d8928a252eba70318b83a6f8c6bb432f4198987ec0dd80c4b19c27417bce. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAIQ2490406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa050596529672e95f04ebc43c0167456cceeaa3dbba905329e6fa0e7b9efa381. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCAIQ2490683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab3fc7cbafdbadaf70e4aebc0a15a93aae80cc6e569a603bc308747b4a87791. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAIQ2490757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea555d76f92063514cd172d3ba3222d6402f8fa3610a516b0d8a33d45dce3335. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAJO2573950.