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 0x55711616bbdac104801f10507ccd55ef35364a56130818b088c7c6e8cdcc6d09. 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/46cdda2c-68cb-4e5a-ab83-9dc33c92f5cd.json and https://artists.proofprofile.net/proofs/artist/46cdda2c-68cb-4e5a-ab83-9dc33c92f5cd.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 0x868a28c3940b45f8108aaee9504b6ce7e88e20e319e5fc2aec08cbf93085e7c1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJW2197909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7f320d2081115acb025c28f7970d6e83c64349a7ffaa575a6449c4019e097d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJW2197914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd49bf4e67ff5cb4a85f1b52e5f804adbcbece6873dc1876303f57e09e58a34. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJW2197917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab261a1ad399ec2fab48275a04dde114f10770523705076b98e2986f8cd3c02. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJW2197911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbea30c954a4cd1885e20ed502d6381d6f42df2456e13504c0c8af2bfe82801. 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/QZNJW2197913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390739d35e5ec456b949a854c798034536728d477b3728854e99123272a04dc2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJW2197916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d21a690a00081639118aa1a0670cf28a7f4e1040412e7d21c8106f63a1f2f78. 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/AUMEV2439261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd721610e74d79bdd8eb5125a3efe23e9da67400b03f785ded60ea65c46fb6971. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUMEV2380484.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf606c844e332a7916e7f840a39c709b97acca18607ed996ff390c0d89679ee. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US7VG2336743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51d72b658898efb5a7f33108174860900a35cd62a55bcf2be4d682c6ba170a9. 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/QZN882362724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f3ec97a2e75ab9394c2868b836f99deeb911a062165963c08565acf3833b35. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDXS2201880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41e1a4221c99e7d606ed07a1553458f6c35919e2b28b9775f3a33123b7c18ff. 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/TCACB1463477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99469c889b296718ff8af896d13463b5a48698d4474359d7b1fe39356e70d1e. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:59:59Z), 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/TCACB1463478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6ea704dd6da3a41812fc0eb09484d019a60692b482b0c00449aee528089dea. 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/USLD91770348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545f3a452c14c3424262de58e92ff49086c1dd0d7b3f1511ebdf0600f2301fb4. 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/COAF42499280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659fef92dbde23348230359b5eadee4396286c7f896456e8d182333d12c6c006. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USL4Q2468124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88048056314469a72a04f268d81f81e987b8719a83d5f1c2f38af3e306d72df. 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/QZYFZ2406944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c2bd13878fcbd26d2c8b523c33ca4376c0ce245def5a3d9ede7844d89a5a62. 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/QZYFZ2425410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08eae14afe95dd99c61545defa9412be84b5ae164e2aee8653310f40c0114ad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLM2405908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140fbc1483bdf73dd699a70a2bd11c887c28bf340926f0eedeaa7a7911e9649a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZZ972358623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b7ef354d4f46b5163d8f61dfaae945d1f41dba74aff9bcb52a884c74c0e651. 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/DGA0L2385182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498758776e76e36e08d9c1b6e16a0413036f882915637c35c8d5ee63f2a240e2. 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/USLD91753123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb236c86e23233ea83288d7ebd4a62fb764bc3c8a46694a2dd510764e65a4d2f. 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/USLD91753121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f6d1fa47d62acf7c0118b858c21341a1098c4164c3cbf97f4042592649b6cc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZYFZ2320234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb58c756315d586842b3fd01db2413853f26ef24cedd99734c641cb59ea85bf. 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/QZYFZ2320236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274b2ba9a5a37731768ba2c1f33c25fd4c273827b70ca24dc8a05f066f4440af. 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/QZMZ92344331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a19ce286f1afa031e9b6726e8546ebae8cfd0180edd23cf5d4503aab798419e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLD91744546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512c8a1f2611b2292f728620d97ec94ccc7305521e3e543bf88ef520521dfd96. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/TCAFY2115488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d07fc07f2f0d0fe78ae5166903fdcdd971d9141f7b3f35d9b9d509591fe689d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2142951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e975551f18cb2cb33d7fe65807e5de7e9c49eb2e7b70db2fad2a979d8bec76d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUYG1335586.