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 0x2103d8adcb03f9dedf288b53962aea745c96972b3f8b5f10af82085c6f6f09e9. 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/c333b109-04a1-4b75-be7d-a9905227f07e.json and https://artists.proofprofile.net/proofs/artist/c333b109-04a1-4b75-be7d-a9905227f07e.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 0x3782ecb2b8f48cf53e638b76512ee0a9fbbaa4803276b7f752afc5dd276070e8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAEL1937280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd84fdebad9262072ad1137d91d1a7373f695bf1adae3ae31c548b4fbf188887. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/TCAGM2208009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300bc8fb43ef91693c32cfc331bb358db127abe61be7f882d892aa926c375433. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:35:19Z), 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/TCAHG2344526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0156bc65b4617d9e08f3b9ea1d77f7c972867a910b2a84cf1409b56665d4a7f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:06:03Z), 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/TCAHJ2319916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bcb8d71ecaa777ff17b8a2517073e3138eba2882e54a371f991177d3890137. 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/TCAHJ2319923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf704b3fd33011f38e51573312879afdf8b346bd0be7f0a22ef2bf1427cbfd8d7. 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/TCAHJ2319926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f88bc268501a8599d14acdd7db848e89b6030c498b98712f6d5e10ebcaf6de. 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/TCAIN2440450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4334021fa5b11be4af8046e408c3e8c3351704efed598877ec239de4d1a70a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:38:32Z), 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/TCAIO2440495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079fcd2f0c8d033e7ec9eeb0b6fe033c5f36a54f59ece6e703d621789ded6678. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:27:54Z), 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/TCAIN2440621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594c425c9aa93467d5e71f7e918e39446adb83e37c9017b10422738cfa369c0f. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/TCAIN2440541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123ad37bfc3ffec1e6fdf558a17398271bc0dfd8c182273a6542fe30bef4b7dc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAIO2440569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c2ebcebdf226c17cb89e34fbba0c781c944407e7c5d29a07b12290368679a3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:35:39Z), 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/TCAIO2440587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c8fccd09c12e64e75aead73d5273da0f54c099ea8efacf0d5214c355744477. 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/TCAIO2440499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b831be5663a6a68262e6fd2b79860f61a8281b1b698d49d86881e3bbdf6e2ff. 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/TCAIN2440600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049bc23c24caf7b13e904c7b4a974271d6d7d7ac086cbcb57f10bfde9f365cc3. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:48:59Z), 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/TCAJU2598720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fb91e955f757449d933a36e9380433bc0558128f17b2281e128e00ca7545b4. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCAJV2598642.