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 0xf8a42fd132b1c8cb2bc3854c12ce560103c435ec05ca4c22d8e41da3bcf19b2b. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1833f4f5-0248-451c-86fb-92731b7ffc0e.json and https://artists.proofprofile.net/proofs/artist/1833f4f5-0248-451c-86fb-92731b7ffc0e.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 0xa5dffe98773f48d21ca338b08569c80ecabf1434e4666a35a7c96259cfd4a91d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITF039991156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffe1e562636ffbe8dc844f4826baa6338fb4a617a2919166e03ebb30811e113. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITF039991158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece6fb0ec4562ae2c2e98d0008833439d608e4a38b9596f17a04eed51e6da547. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITF039991163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e62813978f5bd1dbcbf1e37888fcf02c8a68b9d1a29ea6ffddc01c2106815f1. 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/ITF039991164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f18f317fa638e8251c053f4585554b5e82387d69df6311a3728552b54631272. 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/ITF039966015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562b2914c0769f10f9bee53d9a8a0abedd0fdd414626e1abe18c02ece4cc2d16. 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/ITF039966024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd82e3f525256d32257493cb96fde965b84ae8dc929642e224160d6abffee32e. 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/ITF039991144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75339ef4f081663b0f76022c66254e4c8fd15205e0c9a999ed7a4664a26ad4bf. 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/ITF039991146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36fe0a6f48f9e84d5d4246ec78b58b37a31831b2a09a21cd6632ed143ec11d1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITF039991132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be02ad8346119756e0b6d2beaa9f4d5501a39cb37b6c256d5b9330ba9c803f2. 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/ITF039991135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866a4da75b07e77d8da15f73479643ce4c0c91cc8e06083763462495ae34057f. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ITF039991136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f3a32336860a9e004f9dd468878ddc2aa3f6dfe9074f953fe122a5ec1372af. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ITF039991139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32435ebeab9a900665921d7847c0a6b57447339e99d841f1b6944ab98f0d5caa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITF039991140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e2dc706dc1f39b290450b2a4af2002b032a2351740e6304c2a0f618f39eb71. 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/ITF039966018.
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 0x7db468b62935f79a05985ed9a0e1f20d2e39d29b43e0c11d567b837d8b853b11. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ITF039991143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12afd1716b3fc4f7e7f6141a6edb457cb3c6f3cbc1247367ca8af15ea10ff2b. 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/ITF039991145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6f3f9334acdc29b276687628fbcd658a95ef41e9ce2fbbfa5267d07699947c. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/ITF039991133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc219c6568845c2db8ceea42aaf139b4f0f4483283d894bdf9206e5506fe9def9. 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/ITF039991134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be9c77ec69da99578a87408b89986af7cdb8ed61d210beaa59e68f7f87fd2a4. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/ITF039991137.