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 0xb1a34beeca35d9ea112c75921048a8c6469bcad40583c67c082b281b9228d003. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e57f9d4d-243c-4bde-a1a4-3742475030e0.json and https://artists.proofprofile.net/proofs/artist/e57f9d4d-243c-4bde-a1a4-3742475030e0.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 0xfa94444c3422e327718050a67ec2f2ba511e758466e73894b46a01962b5e60ac. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QM42K1910075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12e026109b10820d99a6c716201233a03081c9275966bcb800dbf617de4b866. 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/QM6N22121346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894f246fd1a08468cae728a2949087deed229bd4daa445e4392bdd307690413c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762370256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f3d3c332b251d2cc671f7d60d37ba40922453394320be5f9eee2a2617ebe38. 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/FRX762361470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb38044123c5debab10b0dc9b54d855d2d31025a051b008735bfa4681eac83a0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX762370258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a5eb47e8bcefadfeb97b8a9c92a441a6f6d5e163548dfa5c6a8cfc1fc9a6ec. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762370259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f9203f3bf2a5861fa87be24f0db4fc2aa2510d45fd07cc5423e188b5e990f4. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:04:18Z), 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/FRX762370262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9699c0d527d0f67074b97d84163b230b884193862ba1c71d5add22ae216dc55. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/FRX762370257.
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 0x6035234360209dbbd5fac14cf6f7c98887412dc340ca5dbc33c47c21cc40954e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRX762370260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e95a7067ec1fc2bf864e2ade7c2883253a2dc42ac22cd8c1d55b9da58026c35. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/FRX762370261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a93b90d2ad89737e2d40855a55bc9a3788a20ab698029d10b72bc5128e65f4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX762370263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8e8e19aef5cf821cef7e5483e7c4d3d5bc2284082d02ce0f4b55b067b5a0af. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/FRX762370264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb1108566c1c9d56119f66268b9f7be52fa161a9229b108001b45c5421f5985. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/FRX762370265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e9902f558699966fe8e30f06b15e2888ba28a3ba47414ea9726700afdcefbd. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FRX762370266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721295ef2330a7a059b62119b3391e3d479189a5c0bf451864a058cbaf23c72a. 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/QZHN42597489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ad7718b53b8c68c456fe237f7b7f7b250b2551005d5487eff5d0c73c601176. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT4K32515535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5885d6636c188592f3a4b5ba02801edf588f2ae3a3a48fc7016ea5d5e660f64. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QT4K32515536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6b6bd350d454fc28267759dfe303cdb435b2e0630858d7ced449662e539d2a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR2X42141516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e7eff76510489f44a5795b91034ed9a1ec4c75e4e16e55f83963e7c954dd82. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM42K1925251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e42452f9acd92f87cd8ba1a00d92aac2f12acb25a5158861182df45b42bd07. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/FR2X42141515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4705ab3cd9e242a57b80474a070937b4829d7fce114c09f31e6a6f386ce3ab9. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QM42K1965252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bb1da3632f9e93a8786e677ab08cacf9f5a901183a294a41f588316d34542d. 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/QM42K1952089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee38d029caa7dbb565cf458cc1fa48ce85ed1cb14ffb22381f7a50a0d782a6c7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM42K1954943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0e5b5926a86967784c8a2b011a3d35f8ea91cc8cd3debc786f5e7265e56950. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/QM42K1990451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18607a8c80c9b1b056762dc611fff0b58b7c71a35b41c776a157293d13847b86. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QM42K1996186.