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 0x617e7e323235000a83c2f274b542c75ab599805d99956355a200c1f3b9c9d527. 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/58e1875f-8d97-4fd7-896b-01447cb16409.json and https://artists.proofprofile.net/proofs/artist/58e1875f-8d97-4fd7-896b-01447cb16409.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 0xd48a7cc76c6f85a9e4eb873008b2d0a5f4c51f528b8f9d2c152c025616b0a3ad. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRX282064447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549f8f42bad85a4e7e9a86764405751d156c040f9125b4c6c892b5e251f01e6e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FRX282064448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8eb7ace6bd1ea94d6b814164de070abd3ebc9f8c9de0a51ab8c15c5be59d30f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX282064449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce90a1c7616f77a450fd42f81ea74494351e8319c826e52a86aa09c9a0e309b6. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/FRX282064450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738f77bcdabdbb9e29c75eecc8a3aceea424e0ae33d10942691e9ed45a8e34e2. 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/FRX282064451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d473eaffe777763f2d120a5d61f82017d219cfd4627731b4d3bfa0c3725e653. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/FRX282064452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07099f88203b79e2b7fec528f9a0f63e7a817585d5675977a4a4e213fae8954. 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/FRX282064453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc468475e7f45ce1d140bd114e4c21aa0778b07270c8a478d12630cde81fba5. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/FRX282064454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2223b6e5381fc3d137f4447a0e20591de6e280aab1dae083f16210fbdd1287ca. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FRX282064455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74911aafa774039d316d9726d1274f3ff4d28624eff87c7f524ea6c1b75ad756. 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/CIUM72000249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1f48794016d2263a9f80ce43d9bd7e533a3a5c9508ed60ad01a4d7b2fa6c84. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CIUM72000290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5263a48415ef776de4fbb10af4b67d98e33019889fd36ebb5ba0849942167f7c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CI2DY2200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d8926a2485d70e83c0250af7ebb0ee5aedbd0767f7ccad37bb94627eb497ee. 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/FRX282347415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8c0d151ba52049b74751fccb821f20e419f8c5b7cb01047327b68f00378c80. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4TW2485298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee01dc19ec905f165efd5d7a838680b06a38dadb4d4a7a98b4d4f1fd91968480. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GXHG92517150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2be273ab46f8fb784162c8e614e9ee82780654a9c7f6e46bc1b93ec22477955. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJW2471092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97fd42024ea50579856488221c9d2cf858cbe380692cb5b96a1c2c5642510ed. 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/US38Y2312952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed041a0bbf612c391dea351cb4661ec6a364c83c5eb24870d067cd1eec57b069. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR59R2386516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed041a0bbf612c391dea351cb4661ec6a364c83c5eb24870d067cd1eec57b069. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR59R2386516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd9137804c79c41552346fc6aac56e6fd1ad51cf50ed89ab0a277c99342a26f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRD6R2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b04c49ea3a96fdc33b022513059ba95be620ac36859bd40c9e7abf10541c3d5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W12421878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b04c49ea3a96fdc33b022513059ba95be620ac36859bd40c9e7abf10541c3d5. 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/FR9W12421878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97fd42024ea50579856488221c9d2cf858cbe380692cb5b96a1c2c5642510ed. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US38Y2312952.