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 0xe30b1fe0e218af6806fad36cb678f57d1c036b395b72efe5211b4188ef3ff115. 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/178d7fe7-ad46-41c2-bfeb-0b0cbf8f1803.json and https://artists.proofprofile.net/proofs/artist/178d7fe7-ad46-41c2-bfeb-0b0cbf8f1803.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 0xbab1b1598fe7bcb74a6974bcff1e31e5f65551bf21e61ffdf6d0abf5fa7b270b. 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/QZHZ62243536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab1b1598fe7bcb74a6974bcff1e31e5f65551bf21e61ffdf6d0abf5fa7b270b. 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/QZHZ62243536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffe5a397b3cb12b139ed4dd4e110198a254d84c5e1c4998f8c487dc25a8a73c. 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/QZNJZ2456639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9eddec11ea276a1ffcb9f94b1b529d6f05cb375e4b7ac0812511edd8e619ee. 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/SE5BU2031319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a61b23d7802b5868c4a33660d30d378cc3e79082e45e5238eedbd13175a7c7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/COA6W1900672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c95ba496592f3e3626aabd155c367657fa585ef3291754918be3c56b335ee19. 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/COA6W1900673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb7d6d9eb15ad9636b749afca917b4aa179ce711e448fd0988e73e4e3064103. 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/COA6W1900674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf8dfc7a9e6a66f61ef6c00eebb9f4d8d809455653b70ad306d7d50771b5e3c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/COA6W1900675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95db9c54cae9ffa4c7ab5ebd83cf3b734a2ecc5149421d5a59e26efc9dd3921d. 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/COA6W1900676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7952df63d45af8cb00ed61e0cf5c7d7e459c534e6e300739b4843fbb05db1e04. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/COA6W1900677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114b40e0c67450b4a1ca40225362570b6bddd4ddbdbe207c7a1c889d61614c2d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/COA6W1900678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fc24a597f915057926efc378484ad4a4b778fd3561fae20b53a87e4ef180c3. 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/COA6W1900679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084309b4281cca2637b73b67fbdc41f4cee6bfc6339e6a5f776bdb6fbc7f2a78. 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/COA6W1900680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e00e96231fb73d740e5bdfead78647ab36d3716506abbdfe5a1ef797250e1c. 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/COA6W1900681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf9b204f5e76fa4fc92639717826c4440885ff3a424f1ad45f3ba5b2cefaf81. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/COA6W1900682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b78c9189b3bae9fcb64360740de9f7a45d4de47763fc0d043680ed7253c440. 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/COA6W1900683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb055bafb746775f953264e4b6749330e6273f808f8043fb751f7218e391e9911. 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/COA6W1900684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfadc97bb93dd7c34344a5b509b3530b69cae022946a39a5bd8230f54776677. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/COA6W1900685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8bca987f329c6bb7979e14604dfc98db7043679c9293ffc82c0fe4ed85f92f. 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/COA6W1900686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad2933e72181a98e67744fe77449dfcb8bed3ba2664c2ce9a86c0b90e288b52. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/COA6W1900687.