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 0xfe4ed7b23e04bbee0c4a64ee6948db5f86598fdf19908474f679cfcc58198729. 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/21c3a5a1-88e9-40ec-a7df-ae3eb00ea4ec.json and https://artists.proofprofile.net/proofs/artist/21c3a5a1-88e9-40ec-a7df-ae3eb00ea4ec.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 0xeb88f98d8f7f8936da0f35348ca38afec2d5cc1acc9131fd6a11e6f5a81788e4. 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/QZTBF2342659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08269a8857e19867658b08679ad9a2469a9833af921d6911ac37585bfad8f681. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/CA5KR2384481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4f52aa93b3f92076b1d784c854fe3c98d131b0f5d3cbb7a683ff27ba716896. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2380062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a12c6e08dfd850f68a32ee9d843cd1bfedf78e0241ddc8e4bd6fdc31c852912. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEM2306690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3d712b43a81eca8b705576ba37a33c917701c4356dbead65f4287b78120f54. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2354415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ef4b788b86e8157b2597b6e794675a605ed30d6dd3d109657672a97b26f165. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USUYG1544801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d3e885955bceb966a10ec260c83672bb17cb407b78942f86313045a90086bd. 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/QZTGW2401460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe162f482e2448826d34d738206281c9bf05627abcefadfac754eb19a8453ddcb. 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/QZTGW2401380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7068134a4e32d677b49463e4bb115ccb47d1d3f3aea62c472fb176fe05f302. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTGW2401378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882738da7698bcdb7c135a7f36867dc8e2597539e70be44281c4169e2c87d42f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:27:19Z), 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/QZTGW2401459.
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 0x3a8895d2e5776f3dc3cc97a89dbde46fad20b9871262e7a4085b6e52f4f01286. 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/QZTGW2400808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7754f03b274be2b6963eb979a4b2460207d8e776bd16905dd90d17936dc2eaa5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTGW2401154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e3920fbfa0a16559bfacb40752ae86c6265c2cac108c34932945a9d8aa5951. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR2486386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23d6c195f000f9ac747df8e9b4911380ea888058a80f71954eb1b743ae65271. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/CA5KR2486385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabab62acd0e34529289cbcbeaed12a6180d2c9c7d98fda228db644e17dc44f8b. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/CA5KR2486387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cba8b04bd995499d4cc389c2e6be2a3d74b3f582c55a01d6a42f9c28f2a025. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CA5KR2486388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52328632a24962a6d7596b943bffb8310330a98e0be7d8b521a04bad2775c2ed. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CA5KR2486389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17efff915bd25970c56c7d6bf37ead48cd6cdf87cceb8ccecc0f303e9506582. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTGW2400219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2bc83e67a721994d5c1394a9920048e39ced75f5fc1063d42978cffe7a782f. 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/CA5KR2485246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad78a43aea12da62970f9e5d47bc01d95e94ca5f8adb5ae2457b1859ecc7cdb1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CA5KR2475352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490d3de25bfbe0f16eadf557768517b89291fb23ff44de262f5459135352655d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNWX2443866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0b92a79ed9ff3e4999b946d2f3ead0468278be7a4fda879b9acd5ef67c6ce5. 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/QZNWX2443867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1f965fcadc12859ee28a621fb1fff3ef5554aeb6194ac300d2f7b3ff3ee76b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZNWX2443865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf11dc5d6e802ccc8ad43c59b6ab84de77210a578c83bbaa76b75ab5ba2cb07. 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/QZNWX2443868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab838efdb8f09fdabc5e7f0ef4a8b4c60735005bd96155874a199ee33c339f5. 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/QZNWX2443869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d5945ed4ceccf8c37d1dd6e60ba10a513acea31af9371fd90cbc2ea08ed23b. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZNWX2443870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a944565955fcf3cfd16fb8451ec48a4fc30e6de6542e13679b6320b76ca93e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USUYG1552357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9ccec0325d7bdfc449beeb770335b13de5b4da8f7d734c10005d237585ba6c. 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/USUYG1548826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe710196c780096b117854d3cc0826a63fe4363b5380e69c1f555e550abeeda. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2425314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b87b2d2ab81a60ace2a2f197f82bacc86d53ca097b2ba124944212986289161. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFYX2441755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2cc2f75936d088fb01a61c883b342f24a7ed1e66d694e1fe71f940dbcf19a1. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZFYX2441756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de5ad547cf254697e15d654464e6c7dc0920fe48f08a3b8cec8eee35327602b. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZFYX2441757.