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 0x3659149d202e5daedf3d09792e805743b030059233be3c0f7b82b80a638dc5b1. 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/59974a48-bada-4d7c-8c2f-4dc0968cd1b8.json and https://artists.proofprofile.net/proofs/artist/59974a48-bada-4d7c-8c2f-4dc0968cd1b8.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 0x673de279176af7ce9bf199bf617f3eceb3c360f87245e0484956cff995fbac41. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZ9JZ1799879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa769514ac7ed103614acf4fff79146faf06c42f6b51d699d1542800c0ab8cf. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:59:44Z), 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/QZARB1854241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8e04652d02737f793e134385d0ba20421cee233c7a2b5e5251499349de3928. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM4DW1803812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc693fd8a4a8ca4639c0e65011de5ad7632e9205a2686b1acf85fed0ced407221. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/QZDA51835621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a37f2b035a35ed8370d89959399e42a8f4ca0d7bc0a52a9bf1d0ab2dc5aabc9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA51835622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efd093909ecb074aa3686be6921bf762c169cb363ecc44277ede180cf82e810. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDA51835623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ae0ebab7b00ea3d87e74b6e05bc0b6606049dad6c1e98373cdee676a277887. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBKPL1958438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4781d2d914419d5f2f44b1f71a03dd8ada0c5dbbffa179e88a06d4b7af86ee6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKPL1975666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7be12732e1e80d85613d3e6feed04c7fea9f09bff8d114bb0f64c4233bb014. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBKPL2099388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65be7cfad5144041cbec0f5a9926491d2b48c6d0f6984e188b594d5efeabd5f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:06:47Z), 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/GBKPL2171924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc177c87b699ac69077efa63ae00ec725c706e9fff315f93f2c328d2e77484a4e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:37:12Z), 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/QZW9L2210769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50478a78419d5adcb6636889ea00db91db4fdaf5b75cf49ad4ab3326f8796c3e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZW9M2281428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e15c6a776bec07f585ed21b1ce37f2f5ddf3f6c1f7e16ead022325b24fad24a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ8GX1702003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02423d5db9ea397bb054d875cf2a30c3f8e220c0f409a2610866e4243800369. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZ8GX1702009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c913b3a66bbe5c1fd91cbe44ed273646d3f7067b9084be2bdc282d01fd201d5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZ8GX1702011.