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 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 0x2ec922f0ac11d5b4d80d915c747d7b559a0b432f57fa970523c8cce3113a744e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b2225d8-a773-4059-8014-a33b08ef56cb.json and https://artists.proofprofile.net/proofs/artist/2b2225d8-a773-4059-8014-a33b08ef56cb.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 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 0x34a6b54e1444c78f2710c725395513236768b41b21ada491118779f1a4bf41a2. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USA2P2150821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8ee5116bcaa187db67ae5ab79808f04d41e6a579370be91b20e6b95b02aca6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2150822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a930bd125c5193b32f2cc90679a786fe70696013e95af51bac04b6df7c72eb. 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/GB2GX2200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45e348e1067c085df707cb199ecb08cfc4c7b3b536f339f33f8db57fcac923f. 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/GB2GX2200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1237cccbfa286726594e2eb140a10b00887daa4aa8fc0dc1806e1032eafdd7. 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/USZXT2352343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb1b4c5310c14b46dbeaa444119937fe014393081eb6a53729ee02e2dec11e2. 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/USZXT2351314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069a7a0c702eb402670a8d2eced2cc99a8595d5f17d778d1773bf386f9273c1d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USZXT2250296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8874936a0796ea6af78d02339421fe7fa5afc8d7afed547e38e53ae7f7dc1b41. 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/GB2GX2200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a35690201c003ada57c0938cb1f93d9518bf9fe946634271ec1e836421f40dd. 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/USA2P2147201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef7843153e690ff2b3b2cfa09d058251832837837d1b8a4fb6c30da5c915e93. 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/USA2P2147202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b8d582e667860dea5c5ae8d86fee2c108906e6e385b47f751535921e5aa715. 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/USZXT2351006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76369c7a34d5c8f360bf4f44cea3d747a9afaf34effd97da36f03517f3baa75a. 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/USA2P2136055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1669f15e3dddfb7a04a9bc060ffbfba75b1bc01b288d33a0f7eafd818dbdec. 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/USA2P2136056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc161c52a2ca60680d1e9ed97b1c94dd3f562f9cda0635b620bbea3d3bc455e51. 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/USA2P2145098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ceeffadde92e650ebd9ffe8eb38a38c54d022d33f96b3db85316f809fb2f4c. 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/USA2P2157363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd51efeb1f9db776ab5f382c0b91d525e9d3a881d8f4f4c0d420cb7e9900c3f. 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/USA2P2239870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d64c92ef23424c798015dcc4724b47fc357c9e43605ddb9aa46a6aad9cc6cdc. 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/USA2P2134968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60efb9ca6ccde751be29f5a1198ad35bbe6dec732c85d26213f866fbd7ae43d6. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USA2P2135515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b35af024bdc24af7144b7bab6889a224fe43ca03ebb04d54427d04a43ff26fa. 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/USA2P2139887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bd1d3ca763315e08f35c7c9a67e286ae9036a68908f70076c157be95897e81. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USZXT2351007.