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 0xa0041041d41d2cb28a4e7ef08d5057fe5af94b6eb8d05a7d8a7ded633f48b1b4. 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/bcf48243-e027-4cd1-af44-74a115c59a61.json and https://artists.proofprofile.net/proofs/artist/bcf48243-e027-4cd1-af44-74a115c59a61.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Classical European Composers For Babies - Vol. 2
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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 0x6801bc5a5e943bec0ffc5efcf3c4ac072c530b63e7e63a7317fd055f1c71efa0. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/DER751074511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fec75a0ee1332b2c3da667001fc8f524efca63222ac1e977913bf8243995c88. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DER752080802.
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Happy Christmas for Babies: Jingle Bells 2020 / O Christmas Tree / Every Year Again / Ring Little Bells / Silent Night / Christmas / O How Joyfully / Ave Maria / Grace / Amen / Sing to the Hear of Jesus / He’s Got the Whole World in His Hands
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c5f2cc136629655403846e808f3bbfc43320a687cf0f8fc07465bbb33cdcea. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/ARK542300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a4a3c709edac417f7fde8c51f99675a3494f15a6d10599087d11fb28c804c5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DED399814083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b571fb7aaf3e5cbb0faa72cbc654ab83dcf14bba9ad67f31b63e67c87bdfe5. 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/DED399814084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e80bc58a6d6fdb41d0e7ddb8726b7bffb096a32aecd6ab1086cbaed279a4ba. 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/DED399814085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf271b2312e8f30da5f98bb919b3e21468200bce025fd9cf07b7eb3fc0061683f. 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/DED399814086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3aadbceb2516b0cf9a204bd38ccec6c6b074c3fc2da115debe646e3a8aa2420. 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/DED399814087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffef849904407d17a302c9e6c49508285b90ae83fe8fa45b6ff2447fa77faa73. 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/DED399814088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe262978f2bb4d8ebc053e84701083382af17dc074a281461caba67094d50649. 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/DED399814089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43093d0576cea4b41a785440270cb0f615c36718677115b680f6b507a68d0950. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/DED399814090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf354edbf0fb28fa7f92615a08f7742be60f25da08a0cf2b8fff3e847183ceb96. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DED399814091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd032d10373cfd7bb3134af828ce84bfa6e0ad502e0b4c66f0fb05476c1653ecf. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DED399814092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe733b510bf720f1e2480e4be19088475a4f2d29139dea43ae46440c6582c9d71. 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/DED399814093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99890143e5a09f757e3ccaea84d7f006321c90b18476d51f9282ff25b32c10c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DED399814094.