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 0x4b421a8e0be36cb975b32d002d1d37ad4c77d9cfa5ed87c4ad34cc54d02284de. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81dba7f7-77fd-4003-9ed6-aa225f894615.json and https://artists.proofprofile.net/proofs/artist/81dba7f7-77fd-4003-9ed6-aa225f894615.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 0xecd7aa1ff6ff12b6d2f052a067712cd4559b1e19d72ba7557745077e874c6d22. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCJPB2474350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ecc89fe431ce83f6cef50d641d3c4b0f536e099ae73da037288081b58a5e90. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:26:25Z), 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/TCJPD2536057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e6afa7caa5d42130289de55e6e2d1f009b1470e03d94a97b83f30b041dde8d. 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/TCJPD2535513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986838c844c488aeeb4dd49d46acb51d4e8f63884b7cb8b418eff90486629c2d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCJPD2540048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1306d88a009fde980916a83de19772ea327bf41c407943b3a748524bd0ac87e5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCJPD2542741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc23add4224ea66eec1fbab3fb31b26f5b9df85f87fa2582abc91fd61b877c88. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCJPD2549672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1b43b11b9232db85fc30a0502a38997583c5461c9b3862a464be6adb82dd32. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:21Z), 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/TCJPD2538399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1427013d37cb5942f38926e8f5c929be68f08da4c3d59adf3c00492665b5ef8. 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/TCJPG2569720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45a6908fb1b5e3377f1fb7e3dafd558188ca77dd883b4bc6ab54877f7a99f86. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPH2505090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d0a3899245683480220e26e5a6e778efd2764d1d9c93281843f375065416eb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCJPH2535781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd023876bbacae881d3f9636e12d9580fe146759170c994ce1328646969230bc. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:05:07Z), 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/TCJPH2587577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195567e86ddd4af377cd32d0bfb87b0dae466d09f91090b7fef5d92f674b5a7b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCJPI2525285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4088daec928ec7b0bb770d69a5eac441804e5f4e9ad6bb93affd2a7774d895. 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/TCJPI2584384.