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 0x035099f0cd4fb3e593688798b1a406cf435556169b21f25edb4733239fa51324. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df6138d1-43a2-46e4-8d22-718e07851f4f.json and https://artists.proofprofile.net/proofs/artist/df6138d1-43a2-46e4-8d22-718e07851f4f.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 0xc9a121a7f9fa5067e391f8183a54a14bf42aa6b725ee74e2752f990710f9c902. 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/CH7812109292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933ae394aaed92b127bcd5780f524fd3250d84cb68fb0305576844c3818d437f. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/CH7812109295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4d64f3a1c6d46785d687e7a1075ccbba4995db483062069a56f20d23ff8404. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CH7812109297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0638ea756c7ea1fa349480555ad51f5a6735a2634944b6bf6b7e6ad12bbb7b6a. 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/CH7812356641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015654adc73707d3587a655e95d62ce259121f5e7665d8dd4d83d4c43dbcfc49. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CH7812351007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a59754aede066afb0237e7985e0b0f5fd00e92156591fe1c4fb596bf051448. 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/CH7812356643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34731acfecf797382541b98a1e382d089cb17ba105abe9dd09416bc61d4faaf1. 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/CH7812351099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4134fa12e7c308f991e2e5b9664ca99bb4d7f3c0ef2a0d65d0a698f1e5f8bc20. 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/CH7812419022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1b730a47d81d2f08b5dcf90c816b10b28e805cdc4e38a634663e4e92edfc7d. 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/CH7812400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759ad016c6a04f53a7e0e88c37d3c46b4e7b3baaf5bbc05a43ed53af53052414. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CH7812368688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c3d0ca09870593491dcf496aba5ea5c2715b564f350ef79334d0f0cc3850a2. 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/CH7812368690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0947a658273de1186e7cdb4fd834aac32f58454418c43231a0195c81c72c245a. 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/CH7812368691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d26ade34ddbe365b64fbf2824604836d903d53e85f7bc9183a107987c3d6d38. 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/CH7812368692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5114945a4b2c0dad75de7920fa47af87a012c8784af6a7c60dbdf3af1c2bc614. 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/CH7812368693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a04a102eedfdad8814f409b65d022e9dd54fa751e1d76653fc4aea3b0f1513. 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/CH7812425381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3816f607e7381f292de35eb818f5df0d2f2c0b8bfb32cc304b0992c09dd4ba6. 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/CH7812425382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bad2b007da98cdefefa434d2516e807b1b714a1ec96ee87fa7450c1aa848af. 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/CH7812424506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca97538fbb1b571a7a8a16a228bf5e3fa9be038b2fe1f97acc39908139083a2a. 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/CH7812408597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eed3a64bbfab264fe9c778eb69540bddd16e608610d3e348398ab0cd5639e81. 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/CH7812352291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7ee4c880330864a1e717474cdcb82df325ef1870a65f9a86a71655e49626cd. 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/CH7812352295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c423f4f40e058aeecfa637e12b8cda0b7592a672fec7b1fc789ec6f5079f057. 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/CH7812352296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734c668a100c7ebc04ff1c47252246b72f16e6ce089e4fcc80ac1194aca148e2. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CH7812352292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2a56650c8b66d03a6ae81605c9b59dbbca8dd3cc20a4af8ee485e096fd9049. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/CH7812352293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd7787f5e2b77af67724bc5d56f016a5f9dc3f21e2803e8149be2566c3de6da. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CH7812352294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb621ce3fa811f25ad3e3c3e7debcc5fffecc02572ebe14492841af95b1c2e8b7. 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/CH7812107311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1cda339030a323bdd5e93abadd196e41a2126a41c04afc499a6cdd8dbb0bfe. 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/CH7812064304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51510cf8d325dc8bebd44bf3099f9ccf06c134165945ce51352f3e70959bd0bb. 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/CH7812342647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f9c231e2cda72c4fc757fd526ace4ed222758415a3ce7c4caf8a7b5efdd1fd. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/CH7812214774.