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 0x93385c0aa2693fc4b39a5f2c1f791fb1d5a8237b30a443e21523e444f1b2e56e. 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/57703c5a-d506-49a0-826a-0c6b55214bfc.json and https://artists.proofprofile.net/proofs/artist/57703c5a-d506-49a0-826a-0c6b55214bfc.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 0x133aebdc17e6bdc06b5593c6baa8b8d6b98d028b7ec8c71cc308e2f545dc632f. 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/FR2X42368863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21538426616e4c23fc081651971d97f2bae6c7fb8cd4053e409252a841eb312f. 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/FR10S2388830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0cbeeb5ef56d6559837e5e27cf0147f63e0ef686482bdc7feb7af17b76d9da. 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/DGA062253189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d719a9d6515f2c7bcee8a09efeb0dc6744e477443de978fd88940eb801946e. 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/DGA052252896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21538426616e4c23fc081651971d97f2bae6c7fb8cd4053e409252a841eb312f. 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/FR10S2388830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffdf30e3c4868063769023d3c0de29c1c43fdbf0369c8e736243278929ba594. Chain 2 (Bitcoin): anchored in block 956995 (2026-07-07T04:27:57Z), 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/GBLSB2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d39cb6e76ab6265289e36bcfe0e9d629574aee19e7e15298cb715ddf224d09. 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/GBKPL1777769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e64a95f757077297d58d5a47fcd87b2c4e0f75e5ae3665e05b62f91cb88772. 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/GBKPL1520532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfc1b7b80dece59e08393f5dccb3fa7317fd6fc7e926e505bb54261e7d3b758. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBS5E1100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21538426616e4c23fc081651971d97f2bae6c7fb8cd4053e409252a841eb312f. 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/FR10S2388830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd53581d1df4cb6d7f75b85dc534b897869cf5ddda3dc1fd35b741bbe717607. 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/GBLSB2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0aefd9af530de4f5dd25a27aad44df2f275d89d64893f4c9f4a3ef43268ba2. 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/CA6D22200298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4e69880867926e9818affc3afb29f24d475105c6ae23d1e251068135941a28. 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/GB7YL1202401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7f624df7d2ae7df3d7d5f97c1a1fccbbf4e94b1b5462395c9985e10059a395. 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/GBVPL2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7f624df7d2ae7df3d7d5f97c1a1fccbbf4e94b1b5462395c9985e10059a395. 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/GBVPL2400097.