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 0xc5fea6a80a47f67275d842eebe1e9ddef278171bb243ec5894fb21a5ffd93937. 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/027ac133-dcdf-443c-95e0-f72bffb6cd61.json and https://artists.proofprofile.net/proofs/artist/027ac133-dcdf-443c-95e0-f72bffb6cd61.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 0x81a30c8dcd928b99510422490c8234919eb0aa1e8b15249aa2d12e1072627b8c. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/BEK019700236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275606445828ddb75bba5958a0a3351ba8c8867922205233877981f71db7b7a7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BEK019700239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe07913f829e50c7481dee7ec2554344bb7d3d3d2ea1054603f3f589c1d312aa. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BEK019700231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4434646fe482c1bf5a7bb01e62a721c9536937ff0badd0361b7fb17b61eae67. 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/BEK019700223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1eb0014646071e38f965e91e138a0e4716f3d308830d1d90531c7efc0d315f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BEQ027700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13fa6dab48ad64aac60b043095ae54bc3ee1e483445024c3fa6964c84c96b7a. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/BE2DY1800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91c77bd21704a2a5ff43aa18c5a3b937782bbaf3c6a85053ed876e7aeb25bd0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:49:56Z), 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/BEK010600509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164a6d3f090551c46a26b9b95f6236de49ea44167732fd5ab55db526caa1481a. 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/BEK011500277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd620f7a7abd4d05fcab5f3a690fad5db063bd9bd3171d10e01039a61dfaa2eeb. 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/BEK011500280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52df0972d0d69b894a23603165e71bbf1265f9a2a06d84be26df43306428f3c. 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/BEK011500282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0d11a704d332a9a0c507e9babfcd43ee9ffe18de82ae75284d0ba02f12e73f. 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/BEK011500287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173b21662efc0bc6464b033d850b0cb3f211a53620def1d458ef21be3342f9fa. 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/BEK011500288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fa7a8f57bc85748db1f03939df4d844573675bdd906c23d267debb3f734b2a. 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/BEX620500143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4221c1586094b43e9cb6689433ab693af7eff5ab87323a0cc339c156fb350de1. 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/BEA921500006.