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 0xc8889fafb4310616727013f3878cd579c54cfe2c94263c955a5309dadd53ca8c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53f5cd9c-dbe6-442d-9d9d-d45d66462919.json and https://artists.proofprofile.net/proofs/artist/53f5cd9c-dbe6-442d-9d9d-d45d66462919.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 0x3b8c69cf4eea7f844d9a8e742e21301650338d6c167265cf57bb6798542e2065. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/GB7YL1405202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdebc5241fd320ec6546e6913ec4d7a6af1cf453f36f1f9305b63c1cb70ae580. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GB7YL1405502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12dc543c66efedba0cd052c31b71bb049b4140306aebbf4b9477bf7cdf93910. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/GB7YL1480101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50781ec200b0773b08bb2dba5fe263e1577c9b3d4f45610407a96f75477326cb. 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/GB7YL1507804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979a6d6b2e19409dbbfaccea1a919728ef4c1ce1f203d74a5535dbee5757791a. 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/GB7YL1507805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69935212fd4e43aa5037dd9107afa38a091c0ca5b29a5fb8dbb603eb9d22f8c5. 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/GB7YL1812303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e5668ea7ecc268d8c39011716359e8c329f90367b2f427772fe94fee8ab733. 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/GB7YL1812302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87179dd9f59d40990a20e2835681315bcd8ac0d96381e38d97dff984a4255bbd. 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/GB7YL1812307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01616c9e8f2f99de086cc256534c1d4c307ae15319dcbab11dcc936ce8dea113. 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/GB7YL1812308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda36693f1c015341f2ab06c21ecaeaae93d5366482602f674af6f6c8d5f36864. 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/GB7YL1812301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df5eecccb1c28bfd7d0a1746ef916b9cd53795109368cecc800d269db2aff52. 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/GB7YL1812312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb078a8d1b6d23266968eabf9ecc4035c34fe11cc370d9dda6c1e5ef5e8937196. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GB7YL1812313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34e762223d0228693cff72cda3393d60f7f091b2cbabdd0c34953d41abe2251. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GB7YL1814001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6373d7788c59c57537a35b2d070aa0406d8c6e88f4217e7682f2bed3eba1ed. 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/GB7YL1814003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7227caa700ab41a76a113dc2feb063424d44941b5775e1475e4a3b609a3e5f. 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/GB7YL1814002.
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 0x92fca929e7a436183a797f19b8a1d6d0cbcf24e5abe85b1e672290e62b592c7d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GB7YL1814005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06cd73acb595fb948215519eee814b3d85819b7cdceba40456b3652d9ef9d79. 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/GB7YL1814006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5b83f736b551120e8f865e00178741c9d1208fa0f96e6a357bee9f69797cf7. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GB7YL1814007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bd9a59254a2a4bcf356fb9d38bbdbd07c219c5fe4bdece9589ac1eefaeeb1f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GB7YL1814009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c08c8c9aa7bef2fef3540f7e9bf773d31429b83f483dd44b1ffb7d881ac4891. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GB7YL1814012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949ade88757db819fc809d6ed9da839922958eee9cafcae6f2fe1110ea4a01bf. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:55:32Z), 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/GB7YL1986501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd7c9c96e07b820182b0a8509eae68b8f61b7a3573301cee3992f2fa4115591. 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/GB7YL1915902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70332c18fcb4a4695e286a792d28ba01a238ff2a762b8e9fce29ba47e619a04a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTGW2401838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e9eb800755fce1a4b48934399058b3ba590eb5dd13277e032affbccbd96d9f. 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/GB7YL1812316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae38117f3811309edb6dc8dff8e6ac655caee395a88ebf1d17d47f273e6535ce. 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/GB7YL1506901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e9eb800755fce1a4b48934399058b3ba590eb5dd13277e032affbccbd96d9f. 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/GB7YL1812316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c7a721c7544f7a9c6e5c6451e2e262a219c7af518dfcc07762368723dede63. 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/USZ4V1500188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0cc7da513896eae6390bb2fc2e2de4dcd131facea0c54a81dacf4139866c43. 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/USZ4V1500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2ed5439be32fe8f8a9a1828206a990c66e31d0fd9ef0956db6fc68fae22317. 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/GB7YL1691605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150f6cd9185af84fa2056812cee915c197d58718a87978bf46f01a63b33131df. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USZ4V1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6358186960b16970afd646d6e1d0a5291cb51d1eec3ecf4a133f4f3e34e08d8. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USZ4V1600005.