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 0x90bfd2b13e5dea6e3412c7c62bf162e74936bde3d9a8f497e9d013bb3e3bc10d. 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/e5fbbbba-effb-4a60-b2a8-37cd4ead8fa8.json and https://artists.proofprofile.net/proofs/artist/e5fbbbba-effb-4a60-b2a8-37cd4ead8fa8.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 0x5fefeed007f6b6a4ed40ac4fec76c5d45c2b65c66cb0155bd4663e99535146c8. 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/TCAGW2346068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa621b34698af642de5833c711d9e9b671e02acaf75d18af3ba347b8d640138da. 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/TCAGW2350906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3448640540a5e11be320e930593673ae2c0edbe7d2be796581e7c53d2f2aec4. 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/TCAGW2351066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40c76a5beae28584055fcbaa6d041d787abf0f93087b0fb89b88fc5ff9c85db. 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/TCAGW2351287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e46950058dedced2a51283c4aaf5b1bc8d1bcb152eca7a1eab7a25d70d77e6. 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/TCAGW2353086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e23b681a209fbe82b72723231c3148b80ecf05e8de52c87165aee5cce35a57e. 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/TCAGW2352351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f81c61db56b5cda3f9a5eaf03d16c6a2fddaa206662a01c840b2e8543738663. 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/TCAGW2352533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcbe59939eaf7931deb3d142c90c0293c57470f127bc2a25403a8382e1f90f8. 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/TCAGW2352630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a139d070b6be69728894feb7413f9826dd8beb3502deb2a13591c6b2e68bbd. 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/TCAHP2399245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f81b11b306db8c9b2c20cef9793e5e85ec3bb44c4ded42a20e944fd34dc9be8. 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/TCAHC2304451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e4a8a447a5dcdebce33e91e79141a232103fcf6a787c2bd101e476de242325. 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/TCAIJ2492427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8c95f985e8af7a103c859e30f8850c4a6080184b8a0106e3e29d9fda9ca449. 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/TCAIF2418239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7997e7b4898b70fb592144e96b2b372da7e74a5ac0d098671bb30853cb6ee6. 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/TCAGO2298234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026b8e3b54b374385756d54220a35500d4119c7d48de5ee68d10d702888c3d15. 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/TCAEL1997310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514002237cea6b03795bb9f717997d3aaf972488d225c8128339d315276350ec. 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/TCAFJ2182877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1508438882b8c5e672db258706d4e2e9dfc5fadb95503841d09bbec9ae4f56. 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/TCAFM2150546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ae1aba341214e5c38b38aca0d7307bda4fba6efef3528f7b32a918a8b77306. 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/TCAGU2335071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2265492b24b1913a91d2098574329813b95c3a62f85bb171d98c9fbb3762d4. 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/TCAFK2179137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffd3a23e8616da9bcdcb2ac0908341bdf6c97ada3ec5cb753bac5d29c7ee544. 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/TCAFM2155391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18dce4e27d693207fbcd0751716ac13707fbb1bf164f46a7dee64ad4a1e4645. 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/TCAFU2157844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf658c20e8225f9c637e9598f199e22f85c91627f83a9de87f184040f3f8d0636. 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/TCAHM2343493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefab5a07aa3763e602cc08e588508dcd815486968565d04a6823747de483fd7. 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/TCAJE2548748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c24ff3bcc8e06a3495e17a924db71441091663a1f0112d2a0364a41ac527fc. 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/TCAIZ2442832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b654716a13a5553130eb59f46b4d56bd83bcc89a128eece156f9a56d6edd35. 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/TCAIR2460113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb014b8d47f2c8cda834beef2f24f299c18768892a6891c4c59e0245f2911cf3c. 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/TCAJE2583957.