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 0x263f83d6981125b142188da9fd7246770400a65b779381690a35d442d2fc78b1. 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/c12a7a70-6a63-4a45-b7c0-227a98635037.json and https://artists.proofprofile.net/proofs/artist/c12a7a70-6a63-4a45-b7c0-227a98635037.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 0xf73962bb76c23f9c76ac6ee6ca98e0f16b10fe5f4398d6b36086b63558dbfb75. 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/USHM81669509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1f43b19681c71fb5e30d26917dd1b9d75c487899ed0d3ee7cb3cd7abb6e158. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCADF1792963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60647e202ba8fcf97b8783ceba6b1d33247af21c90bfe45264f61fd2b1df1498. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCADC1755326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10613d4843f769fcb48272fb467e0d199743446581e8558ae4f92f41f9a5dd1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCACY1735767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727ca867ba8bf8c6fbd9ac0505bdf3c8876fd73464939149a51122a76f886334. 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/TCADP1834866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6e269e29b8cf4d4757eb5351565478eb3ae487333e96f1824201208a6c87c1. 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/QMGR31999897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc739e3bdaa798beb96f0fbd9d1b2e08d76f327e3783851e0e2084d91f7f70656. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:08:31Z), 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/QMEK61954333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac0b580e7339d7ef41eb22413707f9d1d1019fbd4d8b9b163f212cf2049d625. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZJYL1922110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b94d6625472d8d63f8400b79a67b5c539b15b8b6cebd401bc33209a862ae2ad. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAHL2394758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18e4cac38d468156f48698ae5f4b447dc4582350607deb1441e4c451596a3e1. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:00:22Z), 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/TCAHL2394770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5893b302975fdfbb7d1b9715637dd0c04ca0ffbe38d2a47f95a990a3839eac. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:49:56Z), 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/TCAHL2394783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7e7be110f084c5abb0952266ac741ffbc310a103eff6e8c6edcfd2be13a670. 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/TCAHL2394790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1b05542fab52e9ef0aa661870f8ccc13869f00b2ef536076c25925ca3c5681. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:27:42Z), 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/QZAKB2450695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd2b5e7e474e607a1f04d8870c2cbf84e43d0b65ed53e0e456924ebd58ba7e5. 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/QZAKB2453250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab3e7975f27ee116448ae8100bbe5d6b8d2429bfa3a8949b13e78b784d9ff9e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZQAY2591930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a877cb3b8b7186a3f3d18addb746fd8afebb81607747428d61a33e77500759. 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/QZMEM2251952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac64a738d422d26ed9c13bce9d9327cc61298d1dcfcf368139b8b2f0a4436bc. 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/UST8K1857672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fff9deb261d0526e784324160c6491a17ee70c66dc928adc16accce8989f195. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QM4TX1857954.
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