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 0xd5bc081b949aad7f610f3ddf639f87e147161a8d97ad2393e8aea4237895f490. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90365037-a575-4a57-8428-22c28d2ca541.json and https://artists.proofprofile.net/proofs/artist/90365037-a575-4a57-8428-22c28d2ca541.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 0xecd5083614aa44916e41aba59e6c2ee07852c737f74725ec522bc8314bd19502. 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/DKZVA1962517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc0d6b96850f878a31253eed12c12184dd91c12224fcf92654da69f00bca09f. 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/DKZVA1761563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a079f7c5b4cac916381f8101564f0ac189211178d237745d9502df549b04e8. 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/DKZVA1962270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8b6d9dd3f2eec132f93de3f23fabf997f7a5e4b3ce4e5a26cbb986271cb448. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKZVA1962271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54b801a86a75de0b7ec7bc6d25dc6588021d08ce889ba4218810ab7dcecf913. 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/DKZVA1962272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28540be9be4dc9eee20693909c945b14a4c8c5318f71b755428a7187a16d5775. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKZVA1962274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3ff4637685a4cfc2dee7f73cd1c49803691c2ef8e10773c6250e44724bea4c. 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/DKZVA1962275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a080b6bb965586286a1cf6955a4bae20c937d38d676bfdbaf948149e7d4716. 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/DKZVA1560732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3b90dc9adb9ef710322b8554980fbff37fe82c62de693fbd513b8e2c8bb71c. 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/DKZVA1560735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee0a368bf9d05f753e32ec498d80567df9d58bce5ff9b4b399d4f4d68d9e95e. 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/DKZVA1560737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcc662e172b7b48e257435519fd8a19b6b20f710d60caf9051edd7277b02653. 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/DKZVA1560738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1df7b8a2c67cf63ff9ff4d2067f7791d830c76ae35c06631709a9d4c9dbb06. 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/DKZVA1160604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fb817ba3d9045c31efbd88522458e68c64abc131cd328c11b100fa0fb3f568. 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/DKZVA1160605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8c0261b6ee50867b70811ca305279c7a356befa5d225143d4879c8c3d6c02f. 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/DELK10900098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb5d1d312cbe41434a88325c41494b2782029c7eece303f330bb1050f404788. 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/DELK10900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb719ef50bf8e724eddd27aca87186e9c0ed1a09f18fa07bf91d8d66e5e28a8. 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/DKZVA0700708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd9f741b6314a0522bc44bddc981865f588e2ffd1a6a277901aae7b8835ca40. 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/DKZVA2300214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265c700616dca301960c1a39cd63542444d236c35196ab73b560bbfd0e5aeb57. 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/DKZVA2200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36fb8f5ea034389e4d24c50f907fe906bbff25262b16746b927c5a058cc6db1. 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/DKZVA2100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac7422552f689f59b45209e8ce1948c40d4c7666f0acd5542661c49e960ca1b. 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/DKZVA2000168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc3b1a9d5b58600416ac676971406cb429003874974ddcd5af0ef94cac5e8d2. 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/DKZVA1962525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8da5591372ff473c70c598bd9223b73a9cb132526ee5822e69a31a8387fb36. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DKZVA1962470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf0d033518e48f5c4c803a84dde538f076b97be3f6d2d33055a1e86d949c889. 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/DKZVA1962155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4e4da124e638d705efb8cdea7f83f636fe78385feb3033d7b6b23256988035. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLF711810638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a87b9f2c9e29d4e3032fa4e88c4318b127a3140a6874fa415848dfa089932ad. Chain 2 (Bitcoin): anchored in block 957029 (2026-07-07T11:17:55Z), 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/DKZVA1560857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265c700616dca301960c1a39cd63542444d236c35196ab73b560bbfd0e5aeb57. 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/DKZVA2200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdafe2ff6617ec4b7a75f8ff06084ef662abf01b4685a2a81cedcb7122140af4. 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/DKZVA1862029.