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 0x6c92404f3110609003ac2d09c5a32a8814accd40360652a616af6050eff9547c. 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/9290e483-adbb-4460-85af-abe5b3df4081.json and https://artists.proofprofile.net/proofs/artist/9290e483-adbb-4460-85af-abe5b3df4081.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 0x85f25d42ef93524d3a11acb21fe445c5791a958bb90001fd6efa62ef3751861e. 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/HKG732153085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37380b90d8b80d1271da9962369443a9742546820fa6f951a4841e273cd794d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPVI01826310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a088992359b11995fb81ea225c4e2411187f69e9d33f730f704b07fd613546c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPVI01815600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abb1e2a986e04ea0395ae49951ca6f5da9eb2609189190444b350d1af5b2133. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPVI01826250.
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 0x58281993fc57dc18791a4f83030f8a0355cd804801652d23868c4cf05ecd8921. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPVI01826280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a02c07b2c3f5706dd6d220da591dc2d3d5710cdbb5c7a9fa25fac2e68b17c98. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/JPVI01826360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8859496adf3d3d1c6901b1eab9ef7f8c58a36d5f6ba55ba268fef70584fc060f. 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/JPVI01720700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7324dea0b70473ed11af2283c7dcbb8468d9bf2b19312d555ba2097ecaabec53. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPVI01715030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7f514e9187e953079c1a1d93b894727177bdda3b4fab4ccad6210d742dd2b9. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/JPVI01720730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf2be3eb9f6b40ded0ecd13ac95de6da832d76e1310e58011c4bd033f723b4a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPVI01721600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d4088d23732ebc62ec9bc11f0f19733d769717f57228ad59f47100a1556633. 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/JP92A2433763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eab229c9b4935c6c93c4fa46710a9435ab8df8631df605de683b3385d7d2fcb. 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/JP92A2433756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9e6f55e516dd149fcb71253f7b7ad7c64e5d8acdbc37069ff291c0fb23b51e. 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/QM4TX2351483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ad6117dbbb57c19200934bc69dfe33574a2279ee3f29b13f8abbdd6cc4fb5c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM4TX2352023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e05836cacd8298ac1602ee49531b0733e8a2b678c7d39fe8289ed243ef962cb. 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/JPVI02001745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357571239644c797160de1e30953e18a1e104c3a79c4e31fa8b6cdab9d0aeb77. 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/JPVI02000573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4333a6821c246c4586ce2ec6a15903b4d7c98b64223546250e36aa038962eb3f. 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/JPVI01904309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95b9041344ab1694473c3bc8dd1ee125d774225b5a5bb5a38d62b790d37381e. 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/TCJPV2315969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd5b88baa3e1a55a940d6acba6a716fcd9fda4c32df3c2a459d1d4206d17a0f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCJPV2315971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc762f5daf27dedf70fd7efa87edd826538f8e870c71aeb9abb24a0d0eea5cd20. 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/TCJPV2315981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37957a405ad9bb60525f3221ded1aa0206093427a240a613c4c2ea5a9dbc29d1. 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/TCJPV2315984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e5310991ad0b5f5773dabdb7f75f3548960b5502b7184315743172e6e269ac. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCJPV2315985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d9c32e80435aa1b4676a6991ddf9c70cc9044600c453260fadf4cec5490428. 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/TCJPV2315987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0271170fdc335f1c0041a9e6a55b735cd0d1aa43ccc18b0d4b2ced0756953984. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCJPV2315972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7e662d4495548ae67cb8f7c800460c8c869d0e0b38774493deb340c4a9d998. 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/JP92N2230994.