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 0xbc9610438539e9d9c0e1bd457b58e813c774d1369feaa54aeecf189b7daf6472. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a85ba68b-c00e-4cb7-bde6-d987f0261bfc.json and https://artists.proofprofile.net/proofs/artist/a85ba68b-c00e-4cb7-bde6-d987f0261bfc.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 0x27fd9d20ff7cf1b09e71b13e25ef8f8976421acaee10d4bbf2c2bd7296b2d01e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:25:27Z), 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/FRUM72100533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9d158fc9096e20a5dcf08f82e56f31b1afc134dd853271e92adf4ce0c62c44. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRUM72100529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7119161ea268b31cd3eb3c9f8cf7bcb78a4fd625162265264f80b09933b6cfd. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/FRUM72100531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1e9874a17b2f3d676173c1178759217d16ba607f49fccacba685c4a49897c1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRUM72100532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcf70caf300c5c3514cd5f33b2eb62ce7985d5ee52922bbff375bfc0e29d5d4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRUM72102342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f4861ae4b1fc3a7da88eb4e0d38cc282dc4ec0904bb6cab49bd137c3d925d1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRUM72100534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262d2a7c88530b4ef2b2f6514c6bd240b9e14a7dcb52e54bf464156e2a546d7e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRUM72102347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c92efbde3554e7b96963295de12897f35fc0f3198842fcbec6d4ed67db596fa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRUM72102348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce05ef2790d6ff8084b2c2d1f29ef54b4d3eb3a74e150cfabc6db4fc2eca7abb. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:28:04Z), 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/FRUM72401984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197eeaf800fbe828ff7519edf19bca3917d6bf7c071b08ef6b4aa05783158383. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRUM72401988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d980ef9999290f8785c23b965c16bf2f4c8eaddbdbc401bd7a2ba0671a11010. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRUM72401999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3561ce0db814b6a9221e10f5fa2fbcb186f2cb67f310b8ce1e533cfa07e72218. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FRUM72402000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb216522af7b1d3f747cd1a4b51156f5ae093e3cfd15b07efed8d5638426d3b1f. 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/FR9W12234677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836f73d856ea3faa3760ce0138b2dc66ab800951815438a5610288b1ef68fa88. 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/FR9W12214372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa516c15b1374e468984bbb9762c2ffd469c931b4651c4350d3a14dc67346e570. 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/FR9W12136620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa516c15b1374e468984bbb9762c2ffd469c931b4651c4350d3a14dc67346e570. 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/FR9W12136620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7338c6ca56b884b33165377dcaa5380826379d55d5c5170c5d8e326f69eef200. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRUM72102343.