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 0x4fc6553dd93086cc327807f92923874adbb37e2ef201af40d9d344dfd82f2e70. 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/10d8bef3-7cae-43ed-9101-37412e00b082.json and https://artists.proofprofile.net/proofs/artist/10d8bef3-7cae-43ed-9101-37412e00b082.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 0x27d36005eb8ed17a4008c1395ddb764f19009d83453016c915b3056c8443e102. 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/RUA011800322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfede22e00aeb1171b6b61f73bebf259ffe28a955274c26525dc288911248f52a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/RUA011800323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9c1d31fadd9fdd597035bd96c697fd04ee30834ea59999a04296c866479a89. 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/RUA011800324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482adbec7529aaf183d0f7469a2b5d7d4a741bd70d2d67e056f4b527f02b4f43. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/RUA011800325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dd9d3e10ab2ada4cebfe50e0e0fd3cafd2f9bfb71bfbe37051d2602317ff6c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/RUA011800326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe27ad61d12af6e290f1c9010c4be31ca832d202dd47768d7642e1faac009df0. 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/RUA011800327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcfe9d470c3d5e382769c5632d606c04e158cd7838b83bb0e1aa5e8cd4c0dec. 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/RUA011900306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d52c86bb08fbd8bce07053a96038d41a7c4f1a4ba19876e4a857a30b25c8bb0. 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/RUA011900444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2f6c283699e799a8f5ccc9d0edcffe0842db3bafb490ee79943f4f048fc3bf. 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/RUA011900445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174ae431becaaa55592c941446f97dc1872c61379da907896bf1335d355b3b38. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/RUA011900446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1663ef3d07f9c6b835f3d317c1c3fce10a8dfe51afa5f748bc40213a4b43f7. 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/RUA011900447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290cd571059ebe11391d76c188768bdd07b3ece3fd11ae81f3275f8f5df1d2be. 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/RUA011900448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dbc7ec64a3e1202e642a0d833adfd4747dce085fc64cc5c4ed23df8018dd47. 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/RUA011900450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75f0f6f412f6ffc37330ebcc237af82032b3c71c653a7f356752cacc9f57a17. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/RUA011900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a900086f8b74e05ab35188d420c302d497cfb3e1f8f0435d9053eb344516b0. 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/RUA011900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1643d9acdc9b20baac862ef2ac9edaadc5e3f89c921d72c09449528309c1fa6. 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/RUA011900173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204a6f306c6ae353cbf15394a1e343f672685558ffabee58beeb01903c2f4adc. 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/RUA011900210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e5bca1aff3cbdf09675487901aaef8c4d08b7d739cf0c258f6007622a5d121. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/RUA011900211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7987c01a2628921afc08a11dea2df22cd0eb1a0c4ebbbd3cd4a459df809f335. 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/RUA011900212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ffd24c3518d8d0912ed04f05053fbe25dce3e2bce5e7110e2ece554db925ad. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/RUA011900213.