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 0x5458a07c3f6e6b79411c79e2dc457fa53d3a4dd3ee1561c78e15a9056ebc7970. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76ae6d3c-eaba-439c-bc42-71225550c581.json and https://artists.proofprofile.net/proofs/artist/76ae6d3c-eaba-439c-bc42-71225550c581.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 0x6948e302e870a882abcc4ed43e47976fc55fbb75b5f6867b278ca30885e3c4b3. 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/TCAGH2295742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3af55e87829a8a198eb00d5c7194999a81bd0219a894fc519c03b3dae9192fb. 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/TCAGH2295922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b61e0fe1d50908d73fe8a2d2df13e8bfb8c69fe216bdd0f079deab164b3b24. 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/TCAGH2295938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e744edbe7cbc374985c9a7b0744ff1bd30119b5512774d519323f70a58010d. 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/QZHN52085880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ee1a523939b89f6d1d2f00ca9028a78df08f245176c774a8217df434ff4aed. 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/QZK6J2063956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd2fcfb38caafe2b1ed59067c36ff501286140fef9f2e586870c0cda644dc48. 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/TCAIJ2452410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a49bc3e0226228b746db1b76db98f77d0f78cdc4bd1dc9088e0bc4c4f997ee0. 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/TCAIH2405421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c6be180f95658fb222b9d09a5f8ed2092021844ded09f5fa293ec1c60cb763. 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/TCAHD2388584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30a5b8d6f6088b22f7319fa14aaca04ab36e1638546549766e49d672bb922f8. 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/TCAHC2318112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c35676810ce25077dd181e37b6c9484610b3f6c6401e9f87ecd43b6d0e4cd9. 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/TCAGR2225279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb1d58405f50bf8695a9cb0c370de90948d5bf8ea61520a73b52dc12ecd2b4b. 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/TCAGM2244434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d21305806e94dc09ac1fbc0a0cfda1d7ccd57474337a15ad305f57ed5b6998. 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/QZHN82250953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8817d33e375b151d7859fcf7370b8144e3c188e46f8017047e6351307150d13e. 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/QZHN32205452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a720becf0af7944929b4ea8d2c079e9e9f556f309b9b6064e2f53a38af29a1. 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/QZNWR2162365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6a8a9802f3c7f17715ae77c863f3731db59e3b24fa1597ed1c90aec15ebca5. 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/QZFZ32138438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e744edbe7cbc374985c9a7b0744ff1bd30119b5512774d519323f70a58010d. 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/QZHN52085880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92c05e7a52c8ba4f2474a065de92808378cca53f884d48f12d8892fc06e4a1d. 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/UKW3Z2402633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0833aae838560048839766a962e615f0b47049cc3c8a014663fd3751906f8561. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/UKW3Z2402634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5729acf23bad83409c345470275190bf7baff4265faa7df00f14ccbecc69deca. 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/UKW3Z2402635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac6a303345293344b84debb78c7239bf4deb9648058fdb147ea106c3ed418a6. 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/UKW3Z2402637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c950f22fa7a29c2fb753f4d78369621f07315c6c1437258059f67668cb63959. 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/UKW3Z2402643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596637adff570cc93c2fbd132339b62a4b774bc9a340613582dfa8668f036a13. 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/UKW3Z2400873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c6be180f95658fb222b9d09a5f8ed2092021844ded09f5fa293ec1c60cb763. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAHD2388584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a69d7ccd528bf399d3878bf8bd54fdcd6d504701d49280640af27f5ab7d8a8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAIE2415245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd2fcfb38caafe2b1ed59067c36ff501286140fef9f2e586870c0cda644dc48. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAIJ2452410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30a5b8d6f6088b22f7319fa14aaca04ab36e1638546549766e49d672bb922f8. 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/TCAHC2318112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3602dc93924a874746c9928d35b346a36feb11843f1952e6b95335431ea0ce41. 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/QZWFU2481137.