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 0x742b53eb6f1807707c41970974c37e7dc6d0687cdbb00639a97798dc8f08ffcb. 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/c57e53a1-323a-43e4-8800-3f7fd51cbd4f.json and https://artists.proofprofile.net/proofs/artist/c57e53a1-323a-43e4-8800-3f7fd51cbd4f.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 0x4f4aece10662725e4be39c2179517d786745cc8f7854fa962e94e6d6791dc3d4. 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/ITC492000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bb7f62fbc8aeeec0f7573cc6f1312db5939d1b22fe598458bd6b1903aca1f3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ITC492000099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86eb895451cabe76efe727ca0a0349419be6c28437745412a1082014511fa6da. 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/ITC492000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb3b7728cd7605f225bb83dc6293cb68d7778e2fa5d7a115955c26a8d94aa2f. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:42:31Z), 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/ITC492000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadba1874cb91dddd871f94d19a0e32566018ba58ccb2af4a3c5bf0e7a48a418. 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/ITC492000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ad5c1891dabb089448b7f7b74b03e7a107de821ff547d42d5904a0fe18c0c1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:46:35Z), 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/ITC492000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0af0b69c2e3fd994be58cee25f80945948d05e7c913ceda70cdd3834fa4202. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:39:47Z), 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/ITC492000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd12c5da9a2528a4e58dfce599d4a3d69c85e1c493958b6be0478cb3c324dad. 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/ITC492200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372f2a1ca059cee150f886f9938b6598465d780977943cf92f71e231b0367f1e. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/ITC492400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0638ace11dbfee064562616664a0099c26443c898bfc7ba6c664a77e3145a1. 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/ITC492400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f03cdb00f64046ff825c1d56e2439d2f1ebf1b027db8369a37ebd4a8a7226ed. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/ITC492400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fb0bf5358c2ef50e8ced63943003123e06b821a7c7f74fae41df38c912c190. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITC492400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372f2a1ca059cee150f886f9938b6598465d780977943cf92f71e231b0367f1e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ITC492400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bd5eef44bf2d535131cab50dd380566abd50201fe1dd8bfe191e67610521b2. 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/ITC492400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b8d405b2f41baddf6a1e7df6d93e45bb4f834f5e2093f0340c14ca67a68f2d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ITC492400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc86c561616a598f8d763986b8b39f2f54931f0d307e8025e45a6acf0ffd94b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:02:32Z), 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/ITC492400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0638ace11dbfee064562616664a0099c26443c898bfc7ba6c664a77e3145a1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITC492400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce421e6b12956ba639794595b91d14b3658cbe1ea5bb787213f4b09ed3c779bd. 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/ITC492400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa587f8bce75b70031fdaaadd620ea75d0901034e24060fc9806bf28f36b44849. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ITC492400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bf5dd09570bd6e33b645d9fb26500f71d4dbeac00b8a01432b053753242cf6. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/ITC492200117.