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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b92f18ade4b6ad9f1ed3b607ebfa228f93a51c88a6d41b9ba35e0c1c743f77. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/639456c5-cd40-41dc-93ab-56d91cfab85e.json and https://artists.proofprofile.net/proofs/artist/639456c5-cd40-41dc-93ab-56d91cfab85e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01872f6f85342707f622ca4d72ece604f4513b67553625e0b72902b9a5ccb39e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZPYN2374137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326a38b8e14bdbcc207f6e830837d2d6cb17c448d237f5aad35be8a856061949. 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/QT3EX2496985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a38f75575eb2c21333c1a9334cda2b884f7f84032374381301271f952d05c9. Chain 2 (Bitcoin): anchored in block 957616 (2026-07-11T21:52:36Z), 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/QT3F32440510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d0567026a02829933777c3802b0c31fa926556b83f6618f01d1f27694ea080. 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/QZFYY2540721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63005a1c31bd3319b45632d5216d0838497af09cb26e123e55d5320102fccb4. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZFYY2540722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb215374d0eb928254970374412ffe0ac64515ae0384839023b0f51fb1054e1ea. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZFYY2540724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2326c0228e9ebc5b76f11a35469478ef0c1658c047fab556b2d9d58686ca75d0. 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/QZFYY2540725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd24818768d96be0c9183a0877fba61af83328677e3da1406d95c8ecc47ba921. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZDA72516937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7966c0a16afd1d9d454b2d3dec2c03617fd763c8552a538351428621d79fa729. 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/QZES82556012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67643e4a88b451af1451264a57601bfad7bed035516a4a8441c1524c268e93f4. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZES82556013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c701d088a5d5a464934f276f4f1aeb46a303b175f88a4adcc04a6b37d1cacb5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES82556014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dba8b74bf1fc4a45822f2492ef98231f3d776c71e16ca0d1bfa3a60006d65d. 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/QZES82556015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ee4d098f79d46d2287109632a1eedb69efffddf7aa3ea760e2fea82be3d13d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES82556016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858e04b3bf49d67849f1f36c03b1ee4c5cd91145480b677c444f0079896905fb. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZES82556017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706c5da7cfdaaee12def584b3bfb275f9e4861c47704f29ab75e6384024ca20c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN62568852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0018584fc552a44581a855365433bf1d5b5588a471ac2bc0126b6ff47c26cca5. 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/QZHN82580379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28a6f46f6c760559c3b2604520ded899e5ef84a957ea80f7e7a211599e35950. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZHNC2568389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123f1b47482be6a3ff443b2cc2fd2aa64210e062742dec4267e11f240c887eb8. 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/QZK6P2584214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c292acb5f72c1c09de96c578f5594fd35e002c3beed0119edbcf355712cdd99. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6K2537016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff70ca741b81853d8d03c34f8c0f15139809637928f182a5c82f08f4ac662f5a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZK6H2592790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cf06e1c21c899f4c7de135ae1ac660b6bbe6aaf2304b2dc68d6e83cbec6f8e. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZMEM2534163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557f6396f59babf257c88ad3c562e998bdcd711d9c9f11873059ba3b5feaf91c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZMEQ2583527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32875d5fcc63fd16c6d65451df0fa8dee0e532d7208df80d66579f6ea33a71d4. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZMWW2510939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e95146ca7af96c21273247064f421158c7c8724e7969ee3700d534ebf8a7e2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWT2555390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebc63fe22ddef2aa92179a15fb972d20a9ed5034e408426fd4b99936346229a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNWY2529129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eda96ef02a4bb46835928c44d30ffdf11fbae809129734f40e4121032773ee0. 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/QZPLR2542872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8038b2ce3dba7dd57d3c880455a6a90cb9748f187bf5f03522c77be429a1d5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAX2517251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01138466062b6414525062fbbff98e2cd3d13931461cd12c35206b1e87911332. 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/QZTB42519898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1bab31cf0e5cd1f8b686242d49f1b9822906c66061da222e76503caa5371d1. 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/QZTBD2517483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c36c9f4309053f92ac9e0f66c2c35537abd4f86a3aff357b14fccb80e503f0. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZTBF2551470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8038b2ce3dba7dd57d3c880455a6a90cb9748f187bf5f03522c77be429a1d5. 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/QZTAX2517251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698cafd3375c67c8460d61255ec4c70208e803e169f6d6c9eb2d8d66cfe84229. 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/QZWFH2524616.