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 0x74e54290a82e26436410e6a81840c3c77dc308a8c1f5a36acc2027aa660b56bf. 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/452a9b35-9214-4bc2-8cb1-168b9eb82436.json and https://artists.proofprofile.net/proofs/artist/452a9b35-9214-4bc2-8cb1-168b9eb82436.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 0x57205f43955e4ffabb3eda859037b4cd75abd799a19ac75f5ed1689c8d705f3d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNFJ2401584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23ca481a0c66d8b47fb7c4072815f22dc3ecfd2d293bbe297dcf22c9f85a1f2. 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/QZHNA2483351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994ca2ebf198ccfd556ee81753e000e8d349370a662d14d06d2a7ce68789a2fc. 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/QZAKB2376872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d8d0d1c74cf6e96a9e6904a4bb78af494d26654627a268ba22bc4daa1fb9a3. 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/QZAKB2369019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117a1e1b32ca7a9dfab9d78327762316cfbd7a1e1937a775fb3126c71251ccdd. 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/QZAKB2315960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ed9af5dab0d4b53d8a321349d7880edcf0f06b9e21dd40f072b4500cc7a057. 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/GX7852401003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e6459706344238f8ea6e9e53000109fc3cd16ad3ad33327c9cfc9be1eb4709. 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/QZAKB2456441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d1829c7beeaf667fd21bf2531ee492403192626c8362a10aaa5bd0b134c3ef. 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/QZAKB2430590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e09c5b7fc7985d33503159ad532cad12721611438113a28e65627ecd3604bf. 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/QZAKB2420568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57205f43955e4ffabb3eda859037b4cd75abd799a19ac75f5ed1689c8d705f3d. 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/QZNFJ2401584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03e59dbec3aa8356fba0f5db3639c7b2e7504fd042467c3ab9c22af3e9154bb. 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/GX7852400993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7a5fef45d0a1c0c289c32ee5180a26ef867e24da4788beb7d1e62d8c805a6d. 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/GX7852400995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe97d92ae67b3f36068b2984cc5943ce0ca5d654f7a711db9d8a9658a456a21. 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/GX7852400994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfb0a68e85c450861424fefa94f448b36d416311fc364a192e85a4c8642bd49. 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/QZAKB2457596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0da19f9d1acc51a957b3b059ce40bc717f08808f5e0f85d626c6eb5415f6ca. 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/QZAKB2457672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd214843637b927d1ffbdc20d72d1947074cf8825d8e055263834b59458ba2f8d. 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/GX7852401002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a243fa86373ef91f1458158d3bb6966fd9cf160156e39f458d672e912cd613e. 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/QZAKB2457511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a06803224fbefc434ca115f0679fb6ed616a80c7c0f2d04b46e1c4afa4a0f0b. 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/QZAKB2457513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da8cc3f503bc96b19afd015167f890dc9376548d90b280750945eeccef01b1c. 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/QZAKB2457514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d48e242dcea824776c52753eca528f9f6c8f29d47a86bf5fbdeae4e24f035c. 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/QZAKB2457515.