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 0x1080ab52788443a1259cba34379c80c2d809fffdcfe45b0151264bdad4baee65. 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/06d99a8e-f3e6-4de0-bef5-4f98f43db126.json and https://artists.proofprofile.net/proofs/artist/06d99a8e-f3e6-4de0-bef5-4f98f43db126.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 0xd5d70ce6d4cbe5e3c4d38f301b2b1d9a3cf0b1f296153034694f8a7868a93086. 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/QM7282350433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871fdfd59fce2e95925879ea1453fce37184c36712cd0fc7f04a53833d562e4d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMDA72369773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6fbfebb32c96a62d34d7f6d37e1326cad74cdfc46cb8f9be801e607e9762ec. 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/QMFMF2307773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe735ffc33ed5bb6d3a82566202742ade9489be0aa13990a7b11599cc2b57229. 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/QMFMF2307775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df24b07a147e22290d31b3b5a710e4992feae6ea44d6c17921e468a42617ea5. 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/QM4TW2315304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd373cdbefc2220fcbfb06252f44a3e01cf78f36cc54a6761afb70536ba19017c. 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/QM4TW2315319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11aab2b22051c8bf4bf170150a11db5dde50cadd21becf6cd51810244b2e22e2. 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/QMFMF2225200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fa45491d21658a8044a184f1c09cb77276ba13920d449529131f7a12029be4. 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/QMDA72269140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac89620a8b4327b0fb1379ee422f5d4cbf369e6d05fdbc3bf0f975302796995. 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/QM4TW2315358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15cec145857e9bc45441845b830e19dc627adf283115261888f0f4b084695db. 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/QM4TW2315377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89253735cdbc7c0ea4e9ac2d9bd8e3234f9b61e5ad47ebc6067438c2fdd8f24. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE5BU2415885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871fdfd59fce2e95925879ea1453fce37184c36712cd0fc7f04a53833d562e4d. 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/QMDA72369773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dddd065e86de9d63746439f6c5387f7833d94d4cf33430706b2fc7d20f246b. 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/NLE612100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d70ce6d4cbe5e3c4d38f301b2b1d9a3cf0b1f296153034694f8a7868a93086. 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/QM7282350433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02693c4fb3b3805e8fa9c680d08622eedfa24e1fae74cb317526e382b58c63f. 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/QZNWR2247432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8fd87a6017d1cd3b851b317818644a35bc8817ab972aa5840d69b581e18c09. 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/QZDA62220058.