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 0xda6aa457e1c257de4bcc6ce61aff528de17b121836346cc3412cceb31226ee3f. 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/3ba1e15e-52f9-4e37-b9c1-1296066bf1f8.json and https://artists.proofprofile.net/proofs/artist/3ba1e15e-52f9-4e37-b9c1-1296066bf1f8.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 0x08e8a794d8840ff95dccb90e5cc5ec01dbffbecb5e0e42f3e857dbe8753150b7. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:56:02Z), 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/PLK101400148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f8b7068951f16a1f43c9273a7cf7018051081013b64bc9294f6d59c8d9d519. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLK101400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc33d493758a192906985d68d71bfc17e2d200688f32e40b39a2378f1e8dcf74. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/PLK101400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ceab05ebce4db26ee67d8846814a87c23f2967d9f790ee27f12956bc042175. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/PLK101400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4f65ff18e41990fe93ebc3f4678c6bcb5079c677b52d5dfebadaf04db8da05. 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/PLK101400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b513407c60796abd75506ccb5b453dd904dacad6e48182bb5c36a6e39f472c. 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/PLK101400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f386379f3c475aa661c3518f85bf88a6223e5ccc187ae7236ddc00509266f72. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:20:01Z), 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/PLK101400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df81409dddfb3a7e2f2edeac4dff8c894506c0ba9463b7cbce835f9b9b33ac0. 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/PLK101400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a398c968c4fdd23290fccbfdd224a102d7e1b2f37e8d8cb9a1adbe43fb68eb9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLK101400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293862be0dd552aa5156a70a18a0737515d421d3c289fc8d0d684f12e041c411. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:38:30Z), 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/PLK101400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c9f899e80251f0a1a25cebcfe9477c4f88ec84383b27bae62a85c81c33ce01. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZES52147282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ee7bfa2f1dc13ad0426c68483cdd997bf489b97cc9c1d40ff65942dd6f76b5. 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/QZES52147289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9051d9114f4b4ecdcfcee393428cb172a06378dce0152c6348a07488b8bb6110. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA72162715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fa1fabdf37c89882436df608ef23f94b2f26deee7e930866447f2a822c4b76. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZDA72162718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066e4cf10f7b516779163f7e88e132a83002998e278ee86bc90bd5536da10062. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZDA72162719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e57b4540612dec594e9d8314695cb06a558d2c623364adbf66d973ab2fea1eb. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDA72162722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e24c4ca2daa0589f3314521333adb65f7a59fd8b133813d4e9e3efc94014b09. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:54:57Z), 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/QZDA72162724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea7bfcf26625b3a9698f3badea23a183718b7095a36c631d25ad61b9d3684bc. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZDA72162728.