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 0x896811456c0d43ad33f86b961ceedb912d695facae4d278759c3d16e17c9fb6f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/759643aa-3601-4f7b-82be-263ed581bfc0.json and https://artists.proofprofile.net/proofs/artist/759643aa-3601-4f7b-82be-263ed581bfc0.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 0xe2372e28936da25b5bf7e259c3ef7922e853d9e2408d517c3cd481de4b573fc2. 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/DENV31100539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8635cd43825c23abd312ba8a0a22d1a87dc7a398c8e1bfa201066f33037c01. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:58:10Z), 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/DENV31100544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88e3b3e293d3735ac3cf4e613a3f3c266598e9df712ab39c93c8e18a79c682f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DENV31100550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9129cc44a0936c05c19d3badeb0220f76ba50489d5e6387a97ac45d6cc8523. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DENV31100555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c8dc3f2786e6c7c6ba1cfd9c00aa1a50c0c9e34b1fe012518d03215e9a8a53. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:31:59Z), 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/DENV31100568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560a00ef21a7d55ceebb73e0956da840f70bc88c6894046aebad823aafee62d0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:13:42Z), 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/DENV31100573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba48cdfe105ff97a157f07b450acc709b50a2c8c47370dde352ae832053a7178. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DENV31100575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75162031e1c96c9f16effcd9889469aa307d31fb8b9c71022f17bce8f2482dd3. 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/DENV31100582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd88db8ed4fc74176c9d3fd0ef75dcc1e29a29a17b7c39fa33ce87ea7e23dcc0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DENV31100584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ce5059f5d6051ea571aae7d71706452b43b993dd395e94c9421785b613dea1. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:32:31Z), 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/DEAR41979546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7247d6d43d7ca94791b9b0f51120a6c71a11872fb0a04344a888992ef10dae4. 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/DENV31100880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c235e7174c533ba5503154417932641c3f993373e09e0669e5444cc10ed78d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEEP82500318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1de9da62d1428541e2cca713d89a837554d222f4b1e30358e142b7ab15f455. 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/DEXW81900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1de9da62d1428541e2cca713d89a837554d222f4b1e30358e142b7ab15f455. 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/DEXW81900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b28f3782a94af694400954f94b7e2314604f6d67973e6a59bdc7eee3fd7d2e. 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/ATEW52301604.