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 0xe9f39a943ac7878a1b79e289b95062dea93fdfc1cb727d8167a0506055caf4c2. 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/8d79fd55-f0c8-48cf-b570-cec767782805.json and https://artists.proofprofile.net/proofs/artist/8d79fd55-f0c8-48cf-b570-cec767782805.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 0x17a662b6b7f623ff879f781702eb7cb5e162bd0a3b47e81aadfcfe633eb1748b. 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/QM4TX2457044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d9e5bef7d5a01d54f7ce5f0fc67156f773afb0156a0588ba9961d67aa22100. 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/GBJX32052518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238a1ef7a1db0e6a75db3ccd1b8c75d0496fb3538f0ac43dc6d9de3c9572e815. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM4TX2499844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252d781095ff1463b4b116de85d4e2e0a0e314db2e10fa432c8c1d654c21a547. 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/QM4TW2438802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fe79d10cd40ae1c49bd8032265f11178116c3ce445baa3daa61c3a90946f4e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKJSW2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bdaf058725d210b574c667c821a65e70b1922e84ff9e89f55160ea7a448097. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKN6K2400978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619643e8768a0124f503a6edeee9f53395d00b7828c7815c40199fc8dafce390. 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/UKN6K2400979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252d781095ff1463b4b116de85d4e2e0a0e314db2e10fa432c8c1d654c21a547. 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/QM4TW2438802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44af7ca225dc7a5a17b08dc49be7eae49a49d0380651232b7429c1e0288fe170. 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/GBJX32352548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e005aeffe58db980b6c52ba616d669f609f51d57ec1ccbc9770f762e2fdfcc. 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/GBJX32352550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74faaee308452633b0a74b1150248d9f13814e018a04a28b81ab4b61f1c4d586. 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/GBJX32352522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119f90d4876a4acb37725fbc4179c3b4c880ca5ccccca47a85841a86a378d4b1. 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/GBJX32352521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd349456d1515bf0ce82400f45051d2f8d7e6718c701c6716e6c6841019b670. 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/QZA742307948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661c43993a358d05dbeb57710df4d6c149fd4f4a892ddc359f4c2e3260fa1bd7. 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/QZA742307949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd341c3b6f9ee4a7246a1e526f8dc8d70beca7164b3dd47391e0e363ba06781e8. 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/GBKQU2251247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64ea61720175692d773f9b49306c36405f179763812854c6e1ea3490bd5bf53. 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/FR10S2287843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5d49aa1696117f1edf6a7b1c620440d0ad4a77dada887f484596ddc607125d. 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/GBJX32152520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3e182aacbdf89d44f3e4708cf4d6177ed7a62fc863b5eb605a75a4957725f4. 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/QMZQ41633003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8537507897b0c8ef351cf51fd0b555842923d8219915ccdba19ef880f6e4412. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBJAJ2002226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4446fe3833e6cfafb732233eb56ae44205e50e85cf7ea9c155afbc23027185f. 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/GBJX32052511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f3fb2c1a2cfa05c97f43fc51d7b66e705165f95c624099bd98c8877378f864. 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/GBK6Y2014802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680df7c7022e8fc5b9510fefedeb2dd04c79b135c94c7c333cd9884d19becaea. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBK6Y2014801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059c294212674f9d9636903b0af72df38b441acd629ffbcd3a9df874de36433c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UK6GD1900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3cb79770e5061ed178802767f115f16cf6950a8908c70ea833b92bbebaface. 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/UK6GD1900053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc095423998e3bac5ad673c8e7cecbdef5385b662fcb8847cf89731dd3fead995. 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/GBJX34419021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfb1b195900001e79d4794af22f988e6620f5c8cda2fd91a39b89ca203c9b3b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU1939556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442b9a6686246c64241d7c4faecdccdbcb22a79c406c478110cf7371b7c63965. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBKQU2455882.