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 0xa00a454fcf2b26e4b2ffea9585313f70bf736a437ba66c75d2c0feed3237db5d. 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/6c7199c4-fc50-49fe-89c8-aefa9fc139a0.json and https://artists.proofprofile.net/proofs/artist/6c7199c4-fc50-49fe-89c8-aefa9fc139a0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fireside Christmas: Timeless Piano Hymns
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 0x801816670409f5e1af575dc82ad95c09f298f66bc26acd1f542c7c35a43f2672. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZWFG2328042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091b896195f8e939d913d299c15dfd8f298ebe02fa53a6fc4903534d0058a54c. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZWFH2349574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466fdfe4e871ec64680174ae624b35467403ab98526409b2b2723a8718afebec. 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/QZWFH2349577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa497f0a37ec2a2966a9bc70e4ef2668cfde9830932fa5c3afd901506029c4ac2. 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/QZWFN2396376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e4f5fec21d37463ab83f1cd96d801df722cd9f2db6146ea55044d65001a3ca. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFN2396379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd448730b8f2807d93945feea356cc565bc00e090a6e3052aa8a27fcc2eeff50. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:03:51Z), 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/QZWFN2396381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce019b799790a5263de37fc17c069f15f6e0b1e77ea416afe3dc0e98a4748241. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWFN2396382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1072f594db7c374e7ad636044b643a5024a4f2c11ce06e314b1bd26dfc53dbbb. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZWFN2396384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a29dbc12fe964430a26af4c67be7122e30b6119b82019c75b3da70475bb59e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFN2396385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2c985a3c256836022249ae0ad15a9d04c2758b2c631ffea742ffa11786f717. 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/QZWFN2396386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d93984c335c85407de32a81ca443fd386acae5b504520c7feff739235c040c5. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:42:03Z), 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/QZWFN2331845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9796b529a571d7a3fb23355111358e4a923f0c8bd165eeb494b697b980e51ba. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWFN2331848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb076a97c72e9bec0d49730a4bb9fccf97e71148632c2cb836fa94c91b3d68606. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZWFN2331849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868eb19197fe132d38fc8b8818428108d6f305138d850792bd915c2074162e4a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZWFN2331850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be7daead54fbc6b420917e26ea6cc187263904bb20e5373fe1b2a8626db6b32. 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/QZWFN2335349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77b380d0c93592639c8c6387f492af32ec6448378d9499eaa2b94ee155bbe21. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZWFN2335352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a700c96031e7016db249fd0091cb65a4246da7d1b99f0c772e7f406e58e9a4d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWFN2335354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c096c0ae87c2af2e6f4019f19ddcd5261dd601a1785ab0e56eb9b57bcd39255. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZWFN2335355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f90d7c3b29f1d4b5d74ed8629990113ecb30b2803f4b474a36f6f54f6fe3bd. 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/QZWFP2300897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671a5531976c5ce7e6702ded23881dd9ddd2b58c8be0c4fd958ae3b6208eba2b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ62470702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbda084b39e6e9d9059f04a798c45991e908ecb372c38e14cde23a24f7bc7cac. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZFZ62470703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0314cd332d02fd9288cf58740b5921d544aae6fce202a32072120a03d69b3cdf. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ62470709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda8cd3826020caef9e906e951d1a60036fc01bcf47629087aecde4ba1a1f215. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFZ62470710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e1b6975a255954f871cbcb8aed28beaadcf29e9ac42a56274d3cd0cefac34f. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZFZ62471528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cb5600e063528a60078cae9f58c65bb9cad92242d47df4622a89b70f93757b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFZ62471532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786bab0edfef844bbaedfe17ff01b364fa597c9238185d2d3259ff329585586b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZFZ62471538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836bf45e8d8cb32c789bb280545a7f4b32386dd300262a24e6674e0795981f3f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZFZ62471539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee456ab13cb53c54ac4b30ba2277732404857f866731b75a7e388879416596da. 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/QZFZ62471544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65a803cb5283c6b16562fb046a9331baaf88fbdd79aac89a138aa557c6305d8. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:46:08Z), 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/QZFZ62471545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2418c22bbead0732656337c77fd7405216c211f48db87ab2d00583fb54c9deef. 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/QZFZ62471546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fac5d9ff8dbf0080e6db8d7cd642d8b66fbdd8e6707876c2abfb35970d3d72. 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/QZFZ62471561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1a263fd9c2cb609e738ef7aa79109eb6a49fbc69893ccaa4c406ee3283f3c6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ62471563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc476efa68ed1d66d438207e95557bc9561fa7e9cba8860c59d9ac089924445a. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZFZ62492744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46df104267602d0dc5c312e79364644c3090836385ac7556f08b213dcfe1286e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMEQ2424089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf152c6c6989a6b00ed0220d9c8ecf6c396522414d672dc616c88dc95ac36b9f3. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZMEQ2424093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0363a60ce43357d9508df2e3d1f1c0cd5e27367ef5a66bff0b6391e7f7a238d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZMER2453724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3198ac4d9f164d51913bdeefbbf18a7437df30facb59788d79bc255462df2dec. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZMER2453727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03621604ca5dcd44c3d368fc89187250a490564fbdb78d28eaa204269c528d8. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZMER2453731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb0db61bcbe208c26ec50ec2a0e7a2ea4bb1917f4d96a15bb6f3aafd0f6cd06. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZNWT2463190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689e57482504289ecca29d82010916f407f1810ed4b059488b4b1628b8b4ec54. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:35:45Z), 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/QZTAS2422414.