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 0x79d5741d76070a74fcfa89c6cbf74523c9053dc59a31fd6caafa637ae107d5c2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4dd427aa-4bef-42df-a43e-6a9b7aded7dc.json and https://artists.proofprofile.net/proofs/artist/4dd427aa-4bef-42df-a43e-6a9b7aded7dc.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 0xa85f0cd97cfd31338470dce6bde79c95a393387d5b4016c118740325fe5f2994. 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/UKCTU2406101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cb9aabdc5fc136a8e98e63ae4a55bf6f540f2ae8da930a2dbce61ab11a4a96. 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/UKCTU2406102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3caa9d0e2a95a4e7450019f34519a4e020496082d50abf0ef760829fd29dc2. 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/UKCTU2406103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5183def33340bde83aa09b44a585b9464d515ebac4987938418004f7685db05. 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/UKCTU2406105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab86348b9f3ccb12fad5a9442b2a2f1c61c44f728f9d75bdcff30ec7373ed5b. 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/UKCTU2406106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27e3cc40180cdcf57d88419ea2e31f6d99e7c764effd6cf43648de28e3fdcfd. 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/UKCTU2406109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935b95c4291489a6cc1b247182c4474c716e3399591539fbf0735677157e0c32. 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/UKCTU2406115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d5d24ba0d2c8dd95402aeabd132ec5d888e42c8bff877f5232c15648e99761. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/US25X2302393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4515b41413417afe61223aff4f7927360a2d00413f3c80b923e668a764575e8b. 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/US25X2302394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe569e36a9fb02cdf658548dfc3d304fa0ea8a1f2b013bc8eb328574f04313d6a. 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/US25X2302395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7e1b31fa63f76756b7aaca36d120037a36dcf34561717c06f4157366c17688. 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/NL8RL2414857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3caa9d0e2a95a4e7450019f34519a4e020496082d50abf0ef760829fd29dc2. 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/UKCTU2406103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe569e36a9fb02cdf658548dfc3d304fa0ea8a1f2b013bc8eb328574f04313d6a. 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/US25X2302395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4db9ff6eadd0e090f506877a64661149d010e0f4cac31bd52365aa6e923c8b. 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/UKCTU2305902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea07e81410c4258c7a57945942cbfd6d2738894de8475badb76f72da5d807cc4. 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/UKCTU2305903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f4e7e13f1caea8059b49033a92a41942e79330d71547f215479566ec99a89f. 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/US25X2204009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ad230fc771b33676c118d978de9115907e5bb8344dc31e00be45b156a42a78. 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/US25X2100907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5486553044b8af6265778b3cca13c7e191ab1736a49303aca53e59bc600b7d2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NL8RL2429534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42049675c206ca0dfb9761ffa1a77896a0e4902fafecfb7e50802203b1eb05b. 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/NL8RL2406305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4039f63fff122ba98cdd5b1e1e9ae6bb03058bf61557bd2c041fc0b23f13f347. 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/NL8RL2429539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589b2c9bf9ff00284da3eae9904db413936c637e61968546199005d44f97d5da. 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/NL8RL2331589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b9b2318c49b36dc9ba484631198ab7f2fcee47e7047ce3ae1be9bb23e09aaf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFMF2326584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fbdc55361423f608951f13160cc145f086a2847ff3a967eae6cd516ba4731c. 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/GBKQU2422771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31180dc7cb8318a6eb5af86b1bf2cd8dfd1eb211e819b692ab932782b444fc9. 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/NL8RL2325658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d9e68e40842f7d86a767122148adf86b1949e336e16f7788cff5ac4e87e485. 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/NL8RL2318237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d9e68e40842f7d86a767122148adf86b1949e336e16f7788cff5ac4e87e485. 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/NL8RL2318237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c75651d389e203eddbbc17cdfee6d5c10521d915bc3f349262c8ae2421adf12. 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/NL8RL2415259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702e042d4007843fddece39cb2bca8edfa1a32465927e0829104364997e31186. 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/NL8RL2318241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351d4dd8d7a66d0326e1a1495415b3c95670d30038e6fa71b3c83c8c88fe1eb7. 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/NL8RL2427893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517d5d156143884f2810aec1352fa022b35d9270d8ede86d035335b1956eee5a. 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/NL8RL2428996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaf7a6350581e632496b3676684fdae871ab4af60a60c880fb765cc2d3a8e75. 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/NL8RL2320758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf99ec2cef425decc1cf5d81b5c8f1f497794d013578c125ecc6d50a80662958. 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/QM6N22422086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe519f0695ded152ec581adc162de7d97edd905d7e163f3987a0ce047ed98b745. 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/QM6N22422090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfa5a6a386a50a28d68116e1b16c665614cbbc2f2a6f497c15524203e8c0d44. 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/QM6N22422094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6917b604b25bcfd55c94d547c141e64243977712c3f68b955cb9d012de21ea. 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/QM6N22422095.