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 0x41cfcacf09a23e60be32cc811f0d59e2a820da897b30009fe02685f198ddbf3a. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4fb5b95-6073-44a1-aaba-f4ef488aa63c.json and https://artists.proofprofile.net/proofs/artist/b4fb5b95-6073-44a1-aaba-f4ef488aa63c.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 0x817e506529d7df393668562594cf56d085a1cdd746771f15bfbc6a68eba819d4. 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/QZMEP2587967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9f214617d0ca1783bdf2b00c85d2f3ab13f75141d82be4a5afc03b139d1c55. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZMEP2583564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e0e9ea11c6a157e0a44a3b835d8e49c637e75039292d77721471d923585de7. 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/QZMEP2587983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab2d8446bf221a64f1f931031a290707a0b079408a096c14df2466e3504ac94. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMEP2587934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7df8aba1a80c3c0afeba5203a009d3f0f9635f2dc552425b7b036eae924819d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMEQ2594879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8d6a381edb0a1819b1e67fdc9b9ea92414402c0b95e0231f4c3a18c22e17c2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWR2543702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73638b7cca99a10cb4c39a5c436a461592ac5237239989bc601520d0db98da85. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJV2500527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf945e2cc80cc24342ca6ca289be1fac27187a863b07a843339f4a0ad100c927. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWS2524861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a74cd9b280f86e7bdd81c4557b9bce19e171daaa694503662deaf9e138053a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNJV2517951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413fbfa4458862c0a909c2e48d48c100487297d123b2ab29f22e956313e32ecf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWT2520705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65442d233c5f2160f6e316fe03ff91e58fe446d4085deaf978fc11fd11208fc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWT2520714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8816ba34426d0fc090aaa310d937207ddba680862a1b0b91ca1e05e53f0775. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFE2548197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251ffaaa3194a9138b390ded87becdf09f39954bfad4cddb92b3ffdea7c40c57. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZWFE2566483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdd995334df25cd5d886a2570767249f8435261d8ed31764e881d002cd2b8d9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFE2568610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe887388873b996765372c5e170516c02f67e38d1f17d09e586ff71df1d90c0. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFE2568606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b3c1992be9299ce7b6d115cb170e647fa99e9db57c94c2ad9b7690f12fbc4d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ792574950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71266843eb1475c8da2eff3423345843efda70d35184981e90790905845472ce. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZZ8B2408116.