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 0x058d0b28cbd906aa362243641f9c85a5a2b0ec42e2355fe8bdcb5485a8535ac7. 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/0147009b-b30e-44ca-bdd3-f28c2d3b517a.json and https://artists.proofprofile.net/proofs/artist/0147009b-b30e-44ca-bdd3-f28c2d3b517a.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 0x279947a2109f1a5bafaa1515e4b23c63d683d10460b18d432f9dfbd3b1334ab8. 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/DER832406319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391ae0893665225e9e63fa4ff6ea1f87765bac0e2ba9de3c9f336d52483d6dff. 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/DER832406320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b7d8e59a081f92cddd6b7cdbe8726cc2d6f3f764a5da084c904562be25a05a. 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/DER832406321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fdde000d3a01c7a32078401433e5666301ec91d78a244be8e880a4b441e0cf. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DER832406322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d484fbeb8492de1f843dfed9f21ae5fa2d5a5dc55815272d1f19527ff25610. 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/DER832406323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1830b3c0868501d6ee81f5ef4749bc548ce0b36ba412f5e78ae3fd95f1793703. 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/DER832406324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf886f2dd048620c75aaf723281a948f51b45f72cb8b68a945dfd7b51b48a6ef2. 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/DER832406325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df00a04bc19c634f263d4a823ef876cb2595a0ee7f3d1b497ad1c1690e10607. 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/DER832406326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3926d40e938787aae194352e634d1a300e83c5ff3e357eda164f75b8e85bbfb4. 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/DER832406327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e3fafe0023c0ad8137e55634a20de7ddc6a7c70a9e32c3d786074d12a4c594. 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/DER832406328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e0c3187ca8b376feafaadf36e529f9a732e36c1a7377afd7ff6084be580ba2. 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/DER832406329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fe691562ccbb89cf50ed98d17418177d3fb998dc2ce9d8ef4612a6407dc7ab. 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/DER832406330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53815df2f56e04512819f112316030e12ce001fe9b2bbd8be41dbda4c3be3ca1. 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/DER832406331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e34544a62c1d310aa088c51878bd9f2ee7f0e56102ba61655c6ee31d5d0514. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DER832406332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d1ed71b457e3fa0c410a960c66f26502b7ff4ed091a487432a270003794eaf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DER832406333.