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 0x22dbaf96cf4691ac91132cbfb1f1a2e216c21c92a060d314aaa4e6c95bba3d28. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8c8a995-2265-4674-8676-46257f0aac0c.json and https://artists.proofprofile.net/proofs/artist/a8c8a995-2265-4674-8676-46257f0aac0c.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 0xd494730ff8353e419ec81cdf99946eebda0b01c5a924b26cbcef43931d62afe4. 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/ES71G1843723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57787d23e46ab9762207ea5c129ed0217bd2c5394d16ecf36d7af1531ec80b68. 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/ES71G1843724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d5f2e85cefd35db7fcc33ac3bc2b507a52e44fae27a09919ed19d1fe5c80b8. 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/ES71G1843725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8734241ec684a573fc9648af616298508b35d17228165e0c446969c473b57a3f. 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/ES71G1843726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14aa8863c5910a5d5c90bb157d03264d49ec80a1f9c196378fc2def7f1f8a82. 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/ES71G1843727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a7ecbc47fbb0bf84b83e71ae8b27392d0caf93f8b3671834ffc3b11d1d2884. 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/ES71G1843728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6b9fca52a9ba48e982a43da29f34347c71f35d44f6a85b8b4f0b0fc22fcea7. 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/ES71G1843729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf24196fe37853a38b141b639c6380dadea813e5faa504cb006f1224e6b31bca. 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/ES71G1843731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34601dae5d7afff81b26372edd2bf1beb26563bacbe27da50b2cdacae34ee8f2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ES71G1843732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef44cd4ffab46e6dda9921534c39183d4607efcb6ea4c4aa04ca0833e3aa4e1. 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/ES71G1843733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849914967cdc4c4a616b04bdf5d8fff83eed47098cd3ce6777034b1009c105c0. 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/ES71G1843734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cf9d62384cc12e284cfd8c6cf5251a9616732ab2bfb53c5e60f376f1485369. 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/ES71G1843735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418f38d63cc037390c9ec7b07909cb0416fda4a1d3b14bee2a5e069bd6b33963. 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/ES71G1843736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a4d5abe8650bb0c9de3938d27a27a3a21f585788e9e49cc60902f9bd78bbf2. 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/ES71G1829853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d130db5c3b5cfd2efba30807f19158528e9a2fc57cfcf441be52b466684f976. 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/ES71G1829854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b04defe4356f6d1627fa97674421f0a01efd9b6d808b7b25848b1d9db7fcb92. 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/ES71G1829855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc1aad5bd49a73e422d090310b0801ea191dd2027421109a8a0e352e66e1224. 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/ES71G1829858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703edd5ecea8ffe46fd61ab215d87c9a0231b01bd460db1d20e251ad289c6902. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:04:19Z), 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/ES71G1843730.
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 0x93d8528b51f16e665061f86462894a395f398d0b5b980320befe4845fb9e8021. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ES71G1829856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaede7281501aaea32d5a4ec998b1f554bace886dc05e02125df16c85f8de5c12. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ES71G1829857.