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 0x22ba71a87b50644a232eb8dd076fba1313aa93f991275e8202f2ffa33bba0ad0. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c807914-b01b-4a71-aef0-43e9a8d4efc3.json and https://artists.proofprofile.net/proofs/artist/8c807914-b01b-4a71-aef0-43e9a8d4efc3.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 0x13bb82c945d47636749063a5f172d88cf39e976f81530b25a78af5e5d659e81e. 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/QZES62202972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aa8d6a79a96113a82759e9d5ec04871557cb573c3ee7998c230758f97c27ce. 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/QZES62202973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d0d69541f6e003c0a3ff9f32eda45657ba3df00711b7690be8711bd6e2f0f0. 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/QZES62202974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4797b0cb728aef281375a71b45cca040df9cd40d2b1fc146cc9753a566521155. 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/QZES62202977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca71faecf720564be36c1ad0758dab38a5efb003211b2b81775f8b2f97ccaf90. 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/QZES62202978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2d8fe9a9153ae1fef3f403ddf110c6ecc6934b4336be2b12eba93c038ae0c0. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZES62202980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e24946a32d22fc1870c80bdfa3821fb41ae241f892d96ed4c1b40761d801026. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:32:55Z), 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/QZES62202975.
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 0xfdd55988982cc0abab2e1e6e6f0dd233adbd8744d111f4f7f2d8201e2fea11e5. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QZES62202976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3f625510bb95e725fab1bde082d20ff71a715b22a2fd2787d6a6c809bbb10d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZES62202979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f603c2c72dc400e29b2ab0d75120145130799cdc43ff460610cf8725d1b88d. 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/USL4R2041011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4ea5114600e804c5710a0c1f0b9fede973b890506bdcf3a58789d42c0312bf. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USL4R2041014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7e5196e6daede5f8ccc1b1fbe4f5e7a0a6d96f87f8f7eca615a3b3dfe79b87. 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/USL4R2041015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f8a981473e6f46f39f585cae498b3c88197ce74574e349ee52fc7a57fce517. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USL4R2041012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d260b23605bd54b8cde4526d410ff19d9ebfe0e453f029e172cf79da4ee006. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USL4R2041016.
Turned To Stone Chapter 2: Masamune & Muramasa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b4b036a7aabe5b49e4c7eb391daeb445610f929e4e4cec002d18dda8b7dfe9. 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/USY252018036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fce2fea08fa2cd0c6a1b8a9a7f8e71b351fa1167d48fa7e7d01458117019fd3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:43:42Z), 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/USY252018037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16892261df2efc891b04b384bca44045ceb1fc8e5e1167cabe8eabba4afaa0e. 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/QZARB1864683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b60c8e31fb484b322300f62509bb0667099bae3fe23b9a6a6c4e42e1b4eb5c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZARB1864685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de2f34af06dfa5f9e40f89153296e5e9fccf5ecd341d866a5795c9bf530def1. 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/QZARB1864686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df068183158175e37501983aa8c9272f5b6795dba82fa566c32a8dde74b4f8d. 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/QZARB1864687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbcfa0736fcc0138d25be08fac9a0a266c406491cc504f40106d8267d0dede2. 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/QZARB1864690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e41e7429187e6d8c2bb4702111abf91d44f704ca4cb3cd4a21981c2a95f795. 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/QZARB1864684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5593d0154bacbb1f2a8b1d5074311c1dd9006bcf946408419ddf1eeec21f480d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZARB1864688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8707ae8576054fd947a8e0191e7d92ffbbb3385197632a1a1630436066d5efa0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZARB1864689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a46f568684d0ce94c653c37110a00599f555c89f6bfbdd512aa589ef25f72d3. 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/QM2PV1524574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416c1876acd8c505283e183a95f20d7ce90af5bb635bef4f3aba90d921f9494b. 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/QM2PV1524575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef0fd2615faa1bd9f2b8bfa12238dc1e9b7b75c8a3f7a2bab9cba7cd9cae6f5. 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/QM2PV1524576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37a62e2434df71c1c9811e2b57b4ac27fa2ccd90215ad75f01b89dc1dda4554. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QM2PV1524578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918a85fe3fd0aca323704c7c8b79411ce1d36e74ed82ceea9ea2a400ea77826f. 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/QM2PV1524579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771e356ca5485caecc5f090bddf18f6446e3fe822a4369949a8a311fdbfa777f. 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/QM2PV1524577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0526d83438d7d3784c9780a070cb46112bbe20c968ff97abe7a89536274fb351. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM2PV1524589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d281c081e1ecb4f0454d55dd90ce44a3a8eb01d4c8832b3903c1759fd9075f. 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/QM2PV1524590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906f143ab7706b72576dc36c1424ccc7a9afd526710a638c9f04fac8f964b253. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM2PV1524593.