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 0x5e3e4a686550fb5f7b87f7a8a4bdacd4bb7a8d5bcac6c46a7b6323d30f29e7d6. 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/000e3ab7-99e5-499b-b850-923f9f6bbeb1.json and https://artists.proofprofile.net/proofs/artist/000e3ab7-99e5-499b-b850-923f9f6bbeb1.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 0x54ab5be733bd82c815d443d62dfeef92bb11153eac98bb6f016a1c60a3a2ce3f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCACO1643146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e6313b244e09d724a93213aa83c29f55f8329dea6e2fcc60408d8746c77061. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCACO1643151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0441d63257555d54d2999f68100da9a82d7fdd44136b013b6efda03df558e0b1. 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/TCACO1643161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728cd635dab759030ea2bb79c522354c2422f1896bcaee856ad96d5618f6a7cf. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCACO1643166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a21926f36a3b33b10d6ab1c038a4231b46e97472eb465994aa2240634438ea. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USUG11801769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0929c0a144b83a00488a477a081a5cbcc5f253ca1c08f7d10c776ea21cdc046a. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:28:26Z), 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/USUG11802233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b5b8a3146e6ba2966900d10236feef74c5930bdbb15d36950c52c33a3613d3. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USUG11802223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35d4cc45c5e112076ed17f06348e4dc89845c88017292487532c676f28772b4. 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/USUG11802239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d068d61c49d8bcde2734e8f0fdb043642f3fc8b83a16451d6d59120e8164ee. 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/USUG12100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74253f07e3b5f2f5de3b9fe34bc515e53c21f8ab049f6418b0a861b8aa47f84. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES52538092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037fa4fbfd8a36476156aee79b57dc51eee402aae6af90d103abcd388dee954d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA62512148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9e408767556f8d10eb15c668055d28fb74f6995cae9ec7ff0e23da9eb76f46. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZES92588167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9028fe17b6a9e5a1bd7f4f49b27a7595fe6083f309d9fc2342d011e21e463e7e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHN42581144.
Quality Control: Control The Streets Volume 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83eb516a6dc86c8a7cb0c9839745f710b07459305630d5661ae6f03ba01e45a. 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/USUG11902837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb8cd10343baf7c5d31a8a4a5db362aa4b83e6d085100fc1e2aa1f0604c2197. 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/USUYG1087451.
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