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 0xfcf10d7f191d15c43997f9aa12dff8d7880afd0607a814a7012d7685b435f282. 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/de1defcd-c117-479c-9b1a-946245717358.json and https://artists.proofprofile.net/proofs/artist/de1defcd-c117-479c-9b1a-946245717358.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 0x7436716e2c46daa416fc41f8fc57b2ba1dbe95e481759854798140c626f95f7a. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/USHM81780870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc070872150aad50dc363c77699e49d129cafc00093873d73b9a8683ec35b6838. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USL4R2003219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fb6b4a3771ca34da1c93ddb4422bddc8773bae7630d8d04747374061814a2f. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USCGH2125640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7231d023547b2699c6d9b76ba354874701793d656df7cb0729217f64148899e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:06:45Z), 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/BCT4V2100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb372f6d7d1427a90e7bb45a03ddc3f31bb4c1ef88276a8e0d4617bfa2876eafc. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:15:30Z), 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/BCT4V2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc279d0906a8768ade47a1a5f48d38b256c7ed9bd6e50344f1f849f34a5201a. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:34:51Z), 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/BCT4V2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8aa5e00b837e1e03ff9559a2d06d6750261c413d6398eb46d0c3835002fdd1b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:34:52Z), 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/BCT4V2200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c00775128fa49c1155fec376742d5885fe1daae4fb34a362e5e7968c1865453. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:52:22Z), 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/BCT4V2200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8206fde4b03c1282c4bed4b1434d7778cb6e7ea9540cb07194d5d57d8a1fa75d. 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/BCT4V2300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1fa5771c8d3601353cd922c1c1d406032dcd49cc85975729b07d1991a1a250. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKTE32400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bd9df12a7a6572ce22e91c7429afb27c6d17a3d6f2834328972c6181e0e78c. 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/BKTE32400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bd9df12a7a6572ce22e91c7429afb27c6d17a3d6f2834328972c6181e0e78c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BKTE32400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72997ea2e0318ff7736c25b4bad858f87b74e3bba13d3db587ba130672f4975. 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/QZMZ92551329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1706709e6f5fee78a9f3400feb396585e17961b8fb29a76d5d2f903828b8f58. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:25:17Z), 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/BKTE32400009.