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 0xdad78f3d2809101d1c0a2f149ee2d120b3033706eaf237b5a26c867f3f4a0349. 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/94f7c9ed-8e11-4223-907d-3d5c2f4a99c8.json and https://artists.proofprofile.net/proofs/artist/94f7c9ed-8e11-4223-907d-3d5c2f4a99c8.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 0x464d6ea926105a0132ac68e021619289b0096c496a815949710e3ca360d16387. 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/GX89G2284505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4808a69fb2d4184f578714099c4cd9e71b209b6aa697d19c0d38fac2ba13c9. 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/GX3HH2332622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c86081a9fbf18f42d020d48793ab8bbd8cfe5da36ab6ddd29b60a0db2113c7. 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/GX4R52265725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3161d9cb31b957a57348ec11400a7ebb22fd8334f011a913b1bec15747250f82. 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/DEH742329987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8affd511bb74aafa650580a56831fbec754f7829ecc6e4cd9238b4c45ab94d. 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/GX5MX2355247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b775d1bc183b79cb20352922ba1e8cccf3ab226bcced344cf9ee82373435127. 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/GX3HH2394388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ab56748dcbb226cec6bfe927a8cf47e26939a74605e4b83f681d7f2daf0cee. 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/GX8LE2315411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28a83be5f2db65c82814c004670a74191d7ef38791722c5fc6c98364da7aa74. 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/GX8LD2374508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ab892eee464c4a3e460812457bc02e568fab51c5f03c4aee2645bde0ca72ca. 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/GX8KD2362824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6185dc3d1d4a765f6be28b97f451ac4fea11f03b27d9824d14ae670add6b5df. 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/GX8KD2387470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ae9610ee979cb39267df193324036c85fc0292f7602742ac30d4d28f6b954e. 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/GX89G2311589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0432dbe34070ab04a906d7cf28202ce552c7717333ea2f9db26ea04f8ecee9. 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/GX8LE2255089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bc94c472880cba6b4ad097a4c86b62803ebb5fa4e653ac8c7953a9662f1fa3. 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/GX38U2300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459a269b7d184f122cf7b5a1d034b5b316e549975dc6f0918d1a17a5ffab29b4. 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/GX5MY2263941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346ab456172e0a86cc9435cf4f5fad34edd3c6b20fcb05e69622a2acf2c6c85a. 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/GX5MY2242706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc87ab790f9efa29f7b6876a1be29cc82e20db41d9a445b1c815b65b12ae3e9. 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/GBKQU2210684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d37e35967a09839771f6d4c859e82de545c827e39ed54ae388dc189ed0bd35e. 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/QM4TW2279569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d69a08b4f83073e3bc0f59b97528003cacee2a32c3efe2d57004de06961aee. 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/QMDA72168258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9367d626a3a0aac247c8e2a26c9f59e6906856333ab9f81658ef7d124fd22b81. 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/QMFME2022646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a69ecfb8dfe9bd68c474a9485d120dc2456bb3b7a4ffb6e5acf007974ffd48. 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/QMFME2037366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1325b5405457d48a087989d8fd05c6a8f33f3acd888eb57642ef4863d7fb32. 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/QM6MZ2035436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d7aa5a6689ec50e96feb26c146f6ba022690125eeaf66fff338e47d8f00e83. 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/QM4TW2060935.