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 0x3c43a46e8ba4bb89a72aab7fc38e4851be179ec12caaa9230666f5314a9faeae. 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/d1968cd3-87ff-4a62-867d-c912617b6919.json and https://artists.proofprofile.net/proofs/artist/d1968cd3-87ff-4a62-867d-c912617b6919.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 0x3573ce36f8745e9fdc47524da3c39c3a3e0dfdd9aaaf3b639011ae1b8e68505d. 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/GX38U2415998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e3fe1be7d686768adfcaa380fa7c9341352fa3f28854f4d04b80764a94dde0. 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/NLT2H2301203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645e9d2e10827223a177e8d33f1dc57ea0400cd5ca83888ec8e242e7c981555a. 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/GX5MX2335192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4544134c553dc4bc2454f359d7e05591ea93476d2aa05270f119e74346190e. 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/GX5MX2317005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67650098fd981101115b64c08d41bbdd75cbc77e0d4f8c3eb63dc66d60cea3b9. 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/GX3HH2319304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed22adb2e57b3666a4745b4fe1813ab88348e8d0072b7bfddde8e6c38d204e85. 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/GX8LE2319995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb186511190f68fda3d440712034ebea76572f70b2f97daf8215debf4b3f653e. 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/GX8LE2333970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe185b90771402b3601db60ec41e97b23f6fdae85474269f0cf81033edc43ec9a. 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/GX8KD2339719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1577b2a634789d371eb40a28cf2b158e99c1b8faf977919f7d81a62a5fac03. 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/GX89G2378882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee7aa2e02757c54471561fb7f3447fbbed28a74cdb02a7e9569a6c05a81849b. 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/NLT2H2200536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aac25a1d46a14abe74bd08a8082af1f0c006ac319715281b0f60b5240bde2aa. 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/GX3Q92073380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238d5c15d1408951c5fe463987db4a90293293771e23026494e841d13d30b914. 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/QZDA71905476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61adacbfb4b36bfc41a9bd4ddd8e89ee34f0de88c8b28efc534662dc2dc11598. 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/TCADZ1829995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b8a13d5981dcb8ab9b3f4e22155623d2e0ef392132677f73543c2707d8d186. 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/TCADW1811634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ce38c5d48765df1ddc8dd8a0539220a835744e7c0e9db4083142418192786b. 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/TCADT1883880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaee622d5142b50e4e80931d10435f9d2445b732ff46f7e009b024e39d12af03. 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/GX3HH2416943.