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 0x6ff27a242e8cbe1c89a5898f16123568306e84d3f15006d98e0b70ec2068d83a. 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/8197730f-8041-48a6-9717-a0830241af37.json and https://artists.proofprofile.net/proofs/artist/8197730f-8041-48a6-9717-a0830241af37.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 0x6976bf19a8a5f60a4dd3646c1c469f94f2477c25368373c9df3972628a778f00. 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/SGB502345720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9efe9875cdbb4ba8fa962807b7d2b721163e563c816784d313c67f1882ea4fb. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GXBAV2326526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8819ed603af1cf87ec80fcd266184d4105e7a7e3d5b2f1640f9a6acbd7095de0. 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/GXBAV2380559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66069532a1a7d4475236ac4efcec16a3cc348a0feb90176ade107f93efb01fd. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GXD7V2258983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f5ae27b0c802b8a34592bc4eba5ebb96bef3c01ce8cc3017bc862455aae68f. 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/GXD7V2201387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b273ea7dd9c75f752cf1687d3fe060b39ad234cc124c7ba7de276a8f2b4d2bf. 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/AEA3A2363631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad96cb50b62c903ef16fdce8a64f0acb0658990c88395015e267fb46da39e58e. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/AEA3A2397494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33de90a5ed0b14c0a0f9332936a2eb0bd48555cae3747a4678ddb86e8d866d7c. 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/SGW502264696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f16868c2d8fd79ff584eacb6fbfd54f5eadc5e183c64f4ca0c2560ba85cdd05. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/BRSVB2502695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32b76b891a6ace865053c30ea0ee9c5f804e2422719a533ec28974acde5d56e. 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/BRSVB2502739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991d7cb27b391c91eeb73e5bde61e6685999014f51ac0e2dc5a72f33330f1887. 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/BRSVB2503852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41339df1f377c212d610ecd7967431e3df0ea23aae01e48a8e2f8d1a0650a7ff. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/BRSVB2503932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d506d69d3f1bcd4e248563ac365a61a847c0f797373b061ce8cf314496257d. 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/SGW502589275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552dafc993b82dd6d2a30ee76a77492addcbe38f3f3fd3ba216a96ff4d2a8d86. 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/AEA3A2532609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47887642956380c4281c62ebe30d7a2d6307a9de684d5fe371dfa05f4ebe78b3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/AEA3A2528997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933075bd8e396a64167e8f5bc3610075262c64ea9263513f71fdbf2c6322bdeb. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/AEA3A2114050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae8dd833161d9207fdc5f78282d455a8748ca84eb7ee27192e961d1b904dd8b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GXBAV2057869.