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 0x6e9176fcb32cc21060c622135b6f395eb43a0331206431b08f2161ea41bbf3cf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8487eae-0c14-4102-a7af-9bf010071aae.json and https://artists.proofprofile.net/proofs/artist/c8487eae-0c14-4102-a7af-9bf010071aae.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 0x9336de17029da32f00a346e04e10e6475f3c13bf17c0d00677be6c2e3376f1fa. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/BXNXA2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd68468b8e7adf993cd8c2a4f4f9477b82bdd17b843962050da9845486666a0. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:10:53Z), 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/BXNXA2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c915ea32cf1da118e603ff530c71ccd75741e3d9b220915b403feeb71a26ab. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/BXNXA2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d379df89a8e88e6b96332205656cefd0723f994555cb657409aafef52701f0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BXNXA2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeadb61c50a1c88b4ba1bdc47c3915bf48e8e71e71f078b0822fdbf964063736. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:50:48Z), 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/BXNXA2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f615f3e677d70a86351475f66e09b20b0a5e78e8d17e14fd4c32d4576a3a3c9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BXNXA2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e52d5b7eab00243c80840058ff73302075890c14588b067a517bbf9060d3b02. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXNXA2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbb2db22694dfc9ba16a4b451b13dd9dbeac01a742fcffaad5d6d50fb8f19a8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BXNXA2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f615f3e677d70a86351475f66e09b20b0a5e78e8d17e14fd4c32d4576a3a3c9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXNXA2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4561976caef687ae183b0d4b2525d359fe46a77d2946c9557b0dc9180645fe. 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/BXNXA2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2c8629dd34c7589cea7e5e0355721ccdb147950056dd1fc1cf4441a6ed6ffe. 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/BXNXA2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c1b9cc61e648aa452920cd4efe6b1b1c48e3f8dc803464ceabf1010eb7ff7d. 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/BXNXA2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbb2db22694dfc9ba16a4b451b13dd9dbeac01a742fcffaad5d6d50fb8f19a8. 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/BXNXA2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e52d5b7eab00243c80840058ff73302075890c14588b067a517bbf9060d3b02. 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/BXNXA2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7d83ed16d57c0b8aa7200320d6ef4aeb8a8e4fb674e625d9c4b624cdc49fed. 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/BXNXA2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca797ab92ee06175abccd025ca1bcf1e037633bc01ff5216546ffbdfe68f524. 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/BXNXA2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe616293e7ee33d341ed5b4588e396a0827daae2ba7fc4f9c3e08f58375f5fb76. 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/BXNXA2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4561976caef687ae183b0d4b2525d359fe46a77d2946c9557b0dc9180645fe. 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/BXNXA2400008.