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 0x5c52d2c2c94899628ca36e327ec2acd5f9832a1154278473b48beb394b0d7213. 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/a7e8d7f4-ab9e-4a59-8392-28cb3599658d.json and https://artists.proofprofile.net/proofs/artist/a7e8d7f4-ab9e-4a59-8392-28cb3599658d.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 0xe09f6a20f4c8d6b012a4be2e37ece09e9b2639c133965681567d54fcfe891cdb. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZWDW2535330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7115266bb798dd6550d88c826ce9715171420025396445d95c5690cd4069ec77. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZWDW2535331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e720cf4af3c6a252a4b3fc92d9b0b237ee64437c26e9fc16f141aec4c7a69c4. 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/QZWDW2535332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e08fa07c6b1b79eb99894719d8517406c5e2753db3366744c416c590042888. 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/GX3HH2478905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9219484fac4fddd8eac78fca3c1aa976b84c885718d97e2f687c3716a526ae2e. 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/GX3HH2440531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a68e346f6484a6057fa68ab34bf487573372692ea129883dc9e0d6c06db5d7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX3HH2442653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74cf2e9ce3a49d67a1d172f217445e3689e5f05104287edf8431cc6f679be75. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX3HH2448544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c58dd6b06d5a571c935d28588c0bbef4ca63490d1ebf2972a999997f6c1e598. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX3HH2420629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c8040e8feb2995eba1dd15103a0463ff5652be3c29c341fc1bacb554cfa701. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX3HH2455797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e219600f282495d4088eba0f8aef06efbec923a29b0662be7190572b56d94d. 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/QZN882438499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9531bc66c863b57cb22b7695826c09db5d7d055a8676ab4acbb45d86334a281. 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/QZN882438500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ecdb3d29d9d31d832c6cefdd314282d25b8dd39a426f1c6a653df32057eab0. 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/QZN882438497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d390fae2a7a7da99c0fb82428edafa26917732cc442db01b36411e0d718f26. 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/QZN882438496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65ee44ff5d0abce1307f167d79e7a421bf0b0e8d957598f159de0e938c45f52. 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/QZN882438495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6678a7533a1e52f9db89a6780d0c0754f5d57e6aa73cdfe63c2b2f157f715f. 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/QZN882438498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99bf7af3f863d5679be3b621a75c1cc16250216901e90c99b28b0c8c0bdc67f. 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/QZN882438501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ac5b4b31664f8b039f4bb5729cc2815917fd12c0600c0311d2db4137a6278d. 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/QZN882438502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabddf5f96e08407410b9851d167959ec1896203c6717d1153f03780851d5d5b9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWDW2523692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1d1322bdf6f98cb17d5aead8aa6cdfcca2a29e75ec897b1362cf04e434db53. 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/QZWDW2523693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d41f4e5f97e5c381bab7545a3c09411a1d1311e37a55d1b1853904ae9d2509. 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/QZWDW2523694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5fd7fd2e316f91282237ec0bae393ef631f02bb6d08642a50e9f64b0d4aa8e. 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/QZWDW2523695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc796ae5dc3b9fd27a80f426a848d7448c5dc133b196c99c60cd1e6855d991b. 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/QZWDW2523696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26aee70361ab150db4b0e3a12764e1a181c5cf6e3cb495546c128037c556955c. 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/QZWDW2523697.