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 0x51cc139512c39c9799e5c4f57e0b1217e081a98342d96b37a727c61ffe21b1f2. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0e9be93-7805-4376-8575-6b92ec5f63f4.json and https://artists.proofprofile.net/proofs/artist/a0e9be93-7805-4376-8575-6b92ec5f63f4.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 0x31b16fefcdecbd0f0c762a0249a5fe82a3c912fed3a72a1913c8fcb8c30c98b7. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNWQ2433840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a2dc9e6fb091d9fad75723d3e78068ad01524b860532cf204a444d9ca7906b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZNWR2477837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c490bc4629dc75500cb7f4b1aee7afe94fd0123812d5cc1cc98250d333381d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:42:51Z), 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/QZMER2432289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a439b025dc0a71c8e2a24175766e9f93e54def69af0d86cbe9d9786cbb226e6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:53:48Z), 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/QZNWR2482987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547686709ed9180455d899b0032dfc354b7372cb4bc91fa5c3c0a9dd791a6076. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:50:07Z), 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/QZNWS2458546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e4fb5cd4b6b176bad19fcfdf203ca2ca2d47c15cd03a228324dd9a2a220fed. 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/QZNWT2403867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc4ca6f1dd7e1b79b6a08ad7dad1147635a22507855dbfe004fa465ee7c0be6. 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/QZNJY2494483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3fd175ce90c529cc19552a3920d76812b1d848f172a246d176783dc1f0587d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:11:05Z), 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/QZMER2407587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e20b39700981ea795ad66f6fe0ce720c1cb350b25983f4365b948ffc863b524. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:12:33Z), 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/QZNWQ2452162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa268c92e9c86d317b0e2fb54b28ba467791412839a4bf6a6782fffd2364be4f1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:15:46Z), 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/QZNWR2486308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7c14a78024509d409130a466572cfd6656f2c0f38c8652169fbbf686483d62. 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/QZNWS2489990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5f479e4bc7244d9a79de3189d78827ba4c7aa63369bcfac3bfc48a82724fc3. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:56:00Z), 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/QZNWS2499308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41546e33ba3894a8c308b8304bbf2788e993bfb9abf6f168dc89bbf3f4f6a1ce. 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/QZNWT2415155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b89f79636077940053872510d11cbbec1a418a7db3f5dbc440a31da513ff3d. 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/QZNWQ2438435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7d862298232de70f99f0c0adecd88f98a0a6dd50c5a5926db31d575e60d954. 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/QZNWQ2482703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2b80ed6f15d8a379eb6fc2d9de0dcc5c8681c5dbcc98deab0762d1b0cc8b9a. 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/QZNWS2422219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342edc0b3652b0ed86c5443e330fc602184173ef16a317f5a35aa08c34a2a59e. 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/QZNWS2434223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b9259e9186584da8bb12d9a2f36aae3ed1322e95c184764c5affffe92e4f6f. 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/QZNWS2464532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4404d159c36af1c3dc44830551cd5fba4a5ae15d8ecc6d7be6c50cb4c2c92f26. 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/QZNWS2493205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90c8bea87aa8813735cfd9d190313cc80c377315febc5c49eedca415720c774. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:58:34Z), 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/QZNWT2404674.