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 0x51b01dbe286527a35709402f3b2edc82de065283738e17654a3930bf8b3bc995. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e452190-5425-4068-8c4a-902a1c5463b4.json and https://artists.proofprofile.net/proofs/artist/4e452190-5425-4068-8c4a-902a1c5463b4.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 0x8c507cc8752bddec592f50a3aca5ac9e0dc8f88a12c2bf9409c328a75fdec428. 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/BKFP12300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92db2f4020887d8fd66559cdc1973117588ecd7e9ebf96012aaf0e5cd874e3b0. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/BXJK02300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b17e33e3ed7ed782ba5a57d6ebc812b482097a0e417ee06b65dba4b9e11cb85. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/BXJK02200141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278063d011ef38d02b31b2c0666369aec5a0c7a1cc47b8b1d2a985e6e63dae88. 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/BXJK02200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45db5e6c7598909c56db8b4bba222873f7be9c16065560c064ae9fab7fa7c8d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BXJK02200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1102c2dfcf7f8aa9c6506a5a9a0e4cdf4636b734e51fc63c8042c439d1bdbaa7. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BCE0V2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752547ab15de28d72b0d44a6232d590d6f5846f6aca990bcfd169ef5322a1803. 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/BC3PG2200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc115a4617c5bb66b36c974327bfb7f8820092b67d0ca930f967f7753f2846821. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BXJK02200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68ac5515dcea9cb3c0f129ca5eaff1ef72ab189c458dab69498ded288ec8ff8. 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/SE6TI2163503.
Nessa Corrida (vg sem batida & prod.davi Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b5afd6a19a219554d5d7f842767ce3b6257bbd14156b5160aecee2a40177de. 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/BCE0V2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca2ffd44bbcabd43b3353601d986138319bf8b4ff6576850dcdda50b2e7855e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BCE0V2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb994b465c9b7d1ade9405768a424501939c566b18c3e3a06eb45a6580a2df685. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/BCE0V2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c37792d2b3c1e00b9fab3c7b04371ff624d92fcb378340a77b1de400a021f6. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BCE0V2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1102c2dfcf7f8aa9c6506a5a9a0e4cdf4636b734e51fc63c8042c439d1bdbaa7. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BCE0V2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4ec7c0b77a3b7359705df8214e9c92546b03986a3dc44362f8800d497e583a. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BCE0V2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f410a1b729dfa6e80ddf05e8c08e988b0a9c2117ff4d2886130f59e67fe58aa. 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/BXJK02200127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3823dc0ec80bc0d2785569a118c5a30505fac71e3d85bfe0a8fb191b9290778e. 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/QZNJW2094955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34359713615a15d495007f2f610652aeb2d7afbcf9bf718cbb73dbcf0f0098f. 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/BC3PG2200407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f03d3f3d34aa7ab406baa211606d5762330126df67e2f9dcd0ca983e7b0d0c. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZEQU2147571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9790d2d879b45c1e7fdd3221283ba03d0170f81505b7d5a35bda3a241c6c51f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZGLM2233385.