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 0xe6effbea5c86c8f185213a13706d5f958230e9efec4a15913dbe79b6a923f52a. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb10a560-4921-4e0f-9265-47d67705e0db.json and https://artists.proofprofile.net/proofs/artist/bb10a560-4921-4e0f-9265-47d67705e0db.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 0x3b06a892f7eb08aeec0dfaa301eb70a7695e86c45482905817a664ea796a7003. 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/TWU711804783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34bf19e40af84fcad291e7c423666b73630eb05ddcb7b2f9c665317436635b5. 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/TWU711804784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f33d8534983d7fc0083a5b0e257e16931c0b482fb6a3e6fb59b22937e7890e5. 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/TWU711804786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfdada03cb7256e4a3702951e21b3b6bff0ae17d6ff9a99291a1c8944a4d298. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TWU711804796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3ffcead52c0832a98ccc51725419f30d39511ff6727744c0d168d615d425bb. 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/TWU711804779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda8641520f01cdae75c501303c52d0be3feab2253cb86cecf28036425f249ab. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TWU711804810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4793accc7f3ce232281a889eb8e42080df427a9c6204e6ff593c372860d97f. 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/TWU711804812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410a977e216495be8117ddfce1c6c6ad69326114066b4e73184e77b2fd21a700. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/TWU711804790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f331a9f35da9e53b154c4b87ebccfc397d385f9d8cf7ac02ad24ce6f0912a5. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TWU711804804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0bcd9388dec11ceef1ab930e80a0de14b2149833875bf38562bfd0d00d8048. 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/TWU711804813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d494fa6bfd1ba82366aca820b70236cc230d79b4ea2fc74d38dd69bbb62ca8e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWU711804787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d117b8083b18a5fb2eaf3c5c2e2f7ec52fcd960e81a7103853e27107111dbd5. 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/TWU711804792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae73d75562714eab50983a4ea9f4e50bb6cdca3af38ef80eccfa28626310c0f0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWU711804793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53273f338678591e4c2057b54f2e107cb94e9f3cdfac6f935cb4e275d2cea5dd. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TWU711804778.
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 0xf71b3c3a070f1bc82a6eaa0262d8e2b83c474931bc3c7f732e0dd9dba38d5a72. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TWU711804782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1b69ebe6415aa1c85f4edf51971b7df8029681a7b57d5cb065be764ab6f257. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:40:11Z), 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/TWU711804785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc882cdd7bd0eedb3705920eec1228109512c3f787c6f3bffa842f3032d31871f. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TWU711804799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62c8881ed356ab7f4ad70608c5d7f5fc6ae3dbc32c3dc0b49749727a1ea922e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TWU711804781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa2cbe7ae6e7e136f57565abbd9909077cb37abd1c53fbb51c51ad31ec35898. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TWU711804794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d84e9d546a8ff81e7bfb30b6b887cc6df8d07620e60d2255d747930d5e924ab. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TWU711804788.