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 0x392ecd3d48ceb12419a6932b012a3575d15a2969b105a2b5f6228de45601be41. 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/1a73d31a-6323-4bce-a13c-a4f47be57dae.json and https://artists.proofprofile.net/proofs/artist/1a73d31a-6323-4bce-a13c-a4f47be57dae.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 0xa34a27d6e97a1de8e66013d52342f35c82492065d98fe6104c70f872778b4e16. 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/GX89G2476483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81df614c8dd3e7310f1724196c6c186ca5e8dfd67fb0648d51124b496670a7d9. 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/GX89G2423352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcaecc3ca7cba96f15a1d38f734694fc237058c162e6b7495e27c06b505ee89c. 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/GX89G2489546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ec772d15bc89ffe2944380ee65d283a4224b56f11589251d391df2735584df. 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/GX89G2495051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6ee35c799aa6091f953e3c47735d41351aeb2898cba3e93bc3682fadfdd9d5. 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/GX89G2449367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d3ba4cf17f0985791ee17b4f219658ad0f7a1161adcfe377fbaa824aca856d. 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/GX89G2406502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de553e662f45dee411149d792f98fe285743fcbc4fe91a01ea94ae1cfa600b2. 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/GX89G2405578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6277e4112fae34d7d9e13f3ce8a9f52e91d9503c21c1c4d1be93e9b890caeb8e. 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/GX89G2469406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931b1833e15dbb669b47e4484fac019afa8def0c8c9ec4cd466611b5795e3d25. 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/GX89G2406385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea9d4b5aa281264344aec04291be6ee4cd334b1d1076fb18d84d5234bd8c469. 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/GX89G2431044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8122a9f1ca0fa7e16afc665606ac98aef8447f00ccf6ddde31ab52a4d0ad32b7. 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/GX89G2418446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dab63e65daeaeb3fc61966ed96f74d11f94999c8fdd2e4d50565d3db73a091. 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/GX89G2480632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8024ba1d36d69042d3be27031925284891640914b63f5222bfb9ebc1657ae034. 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/GX89G2427274.
Crying Clouds and the Sound of Falling Rain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1447d835e87eb6396f9b6a4023428efc46d7c837ab22d2f8d2d5d5c97a08f874. 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/TCAJF2519797.
In the Heart of the Downpour We Find Peace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6507eb11378f7af6eed76b1174e8547f7e94763222fd5792d45aa53fe5a4b772. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAJF2519828.
When the World Turns to Water and the Rain Speaks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4242c19045227fb4c617c24584ead5e392bfc2686e72360ab8c6df8599cd374. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/TCAJF2519877.
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
Where the Sky Weeps and the Earth Listens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5daafb3cd8e6ef04de4984821c11d657432ad65acf31349871fa2a84615196. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/TCAJF2519860.