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 0xa5a31aa29f56c1230d29353f08fa2b4225ab435ef4bd6ed05494ca6223fb26d7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4d9fceb-769c-42fe-a587-1fd5bf1af7e8.json and https://artists.proofprofile.net/proofs/artist/c4d9fceb-769c-42fe-a587-1fd5bf1af7e8.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 0xc37fbca110c506f976ba1e6b9d67c08f08790ea099fe0cf362d2ca1ea2a27cd9. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZDA42187903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e4cccf6ee4403f3e9f73c63874fddd7deb53e6e4559148fd009bf83a0ea33b. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZDA42187904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc641981fd8905ed78a99fe5ad7363a5aa45ceb52b88557023ed5e9dfe3e48e. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZDA42187905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895c6522642bfe91a2ab38f159a0c71acce9e775c05cb5d022c52b245b34ecdf. 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/QZDA42187907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014b7569fb3281e76b15d3b3b7c55723813ce11cc3291b4386ea35fbf811ac3c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDA42187908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93739d7a1486208c22eecfb5b04a182365cf50df84a8106b5e2ad0c8a1a6d8b. 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/QZDA42187909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29949dfa3e4f0be2389493b98c984a858c96203e0fe1803d4aa7ee8f9543923. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA42187910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8099960fa3fa84755b06788047893f5ebf34e3c01724a41b75600b5d99e2606. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZDA42187911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b672327f24416886c46950a9eb08943186e8290635cdf5b84c4a9179130e89. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZDA42187912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a0f242a9eebc8a65790956e8cf9658509630463c68eb6c700f889697eb55c7. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/SKE012417804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8c4257abaa047f96565338ef4853ea210fa25f49742d0cc902246b6f823fae. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/SKE012417805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ecdf10680f338edc4c08aaa8aadfe838e68076da6bd281858d317d3114a123. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:54:04Z), 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/SKE012417807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486c9410606bdc7c803f5fd9e59b588f3be3d27de76c81691385bce0516fba1d. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/SKE012417808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e1d2c21e5ca21506c72543ed2d2eccdb31c05c39e7a8c4a87faa8c08c0e1a6. 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/SKE012417809.