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 0xceb78d4ac2343cb820f0bc98f69465af8b5df317f84d7f5b97ca4b17d1c3f405. Chain 2 (Bitcoin): anchored in block 953662 (2026-06-14T17:28:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/561e6393-6d41-4200-b1b1-c010e8fb9e03.json and https://artists.proofprofile.net/proofs/artist/561e6393-6d41-4200-b1b1-c010e8fb9e03.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 0x06586c53dc3b90770ef338d99735113d6e479d282f2c02dd07f66a5e52c768df. 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/DEY322205002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff80f52f47795a48db2976d32ec8ae9d5f1acbe26730a984ae47d1fa9bc5331. 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/DEY322205004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ca6aea491f3d31b967960ac6ad5fb8bc6d9ddfb7b85545e58509b5307f28ff. 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/DEY322205005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fa76132f73ec31fe349b11985d4b61d54aae571e2e5ab46369bfe5de79b194. 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/DEY322205006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd60f630310c3eef679dcc73531b69251a3699d7aa1d375fa3389711ef2468f. 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/DEY322205007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f3c3132473643f69ed7eef8cbb758b9a3722b4a7ff28842293a23c49672c2d. 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/DEY322205013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f4a2ca49860f183dff67ea4531a5429cf6e0dd502e0ef7fe709e39808b619f. 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/DEY322205018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25a4d765ae6ee9451fe42cd0bc0c2c5825f80b08e007180259838c76c42d2de. 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/DEY322205019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb109e636c9b19112fafc4b415a20a8eaae485879a96b0cc641842004cec463. 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/DEY322401001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52824d118c52eb2d298e44f194a617c387b02b8d1ba14df5e68f6b9e2606c563. 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/DEY322401002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e51680adda26db213b0e91be070924df6a76950a590b1d23ad06377c1b289a. 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/DEY322401003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fe814376887600016a52513b19514e288aa010f4e031bdd66098b9183c2a72. 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/DEY322401004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b56a411877774b3e32fcc7c16e39faf05bf097b0e849d9292321e78a366564. 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/DEY322401005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b1b0f148d8bcea8ca17bc0c56124d8ad919ed546daf7ac6d818d8843aaddca. 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/DEY322401007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d74fd3363ef79828def84d22caf9d6d09b9b4d2f0619197025d0b4414b16974. 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/DEY322401009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b3d416fc9248ca80babafb42465e84d8caf0b138b8c75b310d43c7c45349ef. 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/DEY322401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b10a88796f2e14943b6b55a99e4daa123f1c274fe4a9f099f7f4e7429e084e5. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DEY322401012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59221a53f3df53b8e3a165651b3757f1b3292b4eac530dea5797184b6dc812a. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/DEY322401015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67af8e77b024975311fe5ba035eb63810b1626fa09a4b83afbb97079988a8cc4. 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/DEY322401018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05e2ba8b98ca7c87b0ef3804c98a18a6939cf0ae43883f51345ab9ae5f8dd20. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEY322401019.
De Manchicourt: Missa de Requiem: I. Introitus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e51680adda26db213b0e91be070924df6a76950a590b1d23ad06377c1b289a. 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/DEY322401003.