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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb100478b26b1f9122407f0b5cca7bf165b4f9da189ca579df23162e4aa12dc89. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04246836-db6a-430c-89e6-9a2919eb3662.json and https://artists.proofprofile.net/proofs/artist/04246836-db6a-430c-89e6-9a2919eb3662.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1998023e626e50733fdc7bd80e740f48ab9cebac05842c545f3f7a7e4dc185c5. 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/DELJ81897187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1246e1d31126d164f5b1fd61fe53496fce4257bc5e2504329c30918bce3f02b4. 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/DELJ81897188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114a66320ca3462dfa28c23e63dc6557852c974454589725d7686545e0bdaeb2. 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/DELJ81897189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab47d23d7a443ba1e86c11ad0d23134e1768148b7e66aab89e8e80cb78f3fca. 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/DELJ81897190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4985146a088c264eeb29ba4ef546396e75743636e57d72775f2d6f7ee09c0d. 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/DELJ81897191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c90250be2a7c7bb4b29cc373801c1104d6be5718e47277a0d40af4c01e4cf6e. 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/DELJ81897192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbb96d8fcad238c0b5c0631a555bbb62a4bc16481142f826abe33eaeb23d695. 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/DELJ81897193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15aa7936a4a87588a5873cee89db0334bc3cbd1842734865265804dda5598e64. 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/DELJ81897194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf10ca1664942b5942cc83821cc530ca8f8fdd74fa071a104214f0c195395e0. 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/DELJ81897195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75098f65ec0405a4fbc12ac763beeba327699fa55c88d2939296903ac94778d5. 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/DELJ81897196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14ca01aafefb4056061c7ef1f19a8b6f870624f8ab8528775a8063a339bb3b9. 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/DELJ81929033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9880004926cd43529a29bcb0bd535f1122a5635371215bf42918d3a2abf6d5. 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/DELJ81929034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8364ec9da785e69f33d7be2e4f2a64f6f4511411d04881f831adc25ce552c689. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DELJ81929035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093f9e7215b608addb4e1f05df4ca90135fc077c785b65303f70e9397f572e4f. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DELJ81929036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8208bfabce0e6ac422863993a049c2b7ec875bc4295c3a972b5272a6b7be25a6. 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/DELJ81929037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24bae199a7f1f29257350c290787bd0e43b3fdd93da11e0761442811f526292. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DELJ81929038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3ece5a35102bb47a57e722cd8e2d6c891b2012d85d3619f1ad296b4a450115. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEZC62250826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6a58c0ecd2d7e8977b1991eaa4cebc73973de30b3deee2bc68c41021cade02. 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/DEZC62250827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf033e2effc21735d199fc571658fbd829d9600ab96756bc1e6a81d05cf5cee5d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEZC62250828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3682e727d7b423a3843a6d69ede89a29946a89ec94330907741d67f5ffa7c06a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEZC62250829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8180229530d8d2151de421f3af32f4d661b51df7c9286d77e09d1b374492744a. 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/DEZC62250830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed72fcfb6a47c04453a88f3b9ffb4ccba52dc4c85a0736e2cc5bdc3f4881307. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DEZC62250831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575edfcf5ca218521d7f8b0ea6041ef2224cdf3f0ec2013ea4e5a9e60b66cd1e. 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/DEZC62250832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fe2c1704fc8351642a01bf8af2cd7f30243c9c635f4e7a40f8e61480d9b257. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEZC62250833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1effc709056e439211618504b770e454ac977416fe5969a038a15975286654dc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEZC62250834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffe997b8c3f7584d715f7a5a928e513e86707438002a88eb554072a47619a87. 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/DEZC62250835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938ac782351157facad4f3103461b15a288eddaea18e94ef851d46d7aa22b7f8. 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/DEZC62250836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677615756f621ad918cfe79b6cd63b42dbdf755ee6f9574e896f40ad385c6d8e. 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/DEZC62250837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa299b37e1f0f913d08898b1057f34286cb831b9da23b50f6b064c3b590e67e1d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEZC62250838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc195a2574ec21a81f494d45efc45f5a139f619c307ca36669cbb2675487d3d81. 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/DEZC62250839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c8c818e9c11e4c724252d74c3c7820f01fb1fbfdb3f54384285d01fbbc5c18. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEZC62250840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75f7819137a96d74fe1e923a2a95a9f175f3f6aae3420b1b7558268749e6239. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEZC62250841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f42dab12f83fdb164d801cb36bae54ec456ac39d81dac943a11c03b6187dec. 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/DEZC62250842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d4f3e624e27e07c8d4b4491cfdf9f29b7caa02b2f85201c32a9b4a3d2d3a22. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEZC62250843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981dc5d9a85f76eb177a31c46959de83b154f76afc6db1f661e04f816a969aef. 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/DEZC62250844.