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 0x8bf5bc7ac9a7ea3bc54d9cb31297daaf5d6a16e31c25a038b604933f8079a82f. 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/aeccce39-32f2-473c-b29d-9bdf5f2be9f2.json and https://artists.proofprofile.net/proofs/artist/aeccce39-32f2-473c-b29d-9bdf5f2be9f2.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 0x0c69d19d50a2ae9c713a7dc013222def81238453cd39964ab9dc67455e283c95. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:09:04Z), 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/FR59R1512977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd26493d7d6f503ef65fbe503425da21932b8a128087db5cb280ae2398aac81. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/FR59R1512978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c02e2e3fccaa9d74d11df5b8c2db67640c428810bc491c59ae6345eff7dcf87. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR59R1512979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea6f6e5e04b606b1e133e0ecbe410a1be1ce362772c33591286f80fa89b4b1d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR59R1512980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89105d5838aa7086e4c0a7b0e1283a6445cf7e4574631f5de4ca870422813c90. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/FR59R1512981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e7e147b4334a1b1617e45000cf2f5a03f7a233b4ca1e37e30307a5953ab94d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR59R1512983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa273c4036bb4cba3fc2671171206b819900fa59923c202b8d7ba83cdb165ce82. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/FR59R1512984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042d38227dc634b41d40eefbe505c6b1138a0b3737c13b2a61c0b5be9c825823. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/FR59R1512985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d27ec0fa87e909fb8d49b997f7ade1eabdc3a2ce1aec5fec9249ebd21990f3. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:07:33Z), 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/FR59R1512986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22fa00d278227e30ee9f783d5e4e951a3d6801213ff43deace7e71791462dc9. 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/FR59R1512987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4faff0d08c3aa9cf5c1273ce00f6c22bcdcecb8a7c03fc082cff773d999cd2f9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR59R1512992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fd89306f28890f5f52512b3f1e5f8b79cffe044b373784c5700fb1ecc69d96. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR59R1512998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e5679235a90437a918ba2073d5858723ce87e84dce1e6cc86c1fa8e4b1c579. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/FR59R1512999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6419e2179902cf6670e5cb941d1add35597f3ad37068405ee8a1b6904f4807. 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/FR59R1513008.