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 0xb4054b7993e7c7a13b9f6ec36b14497ff8f696290b6664744253cabe0d3cb4ea. 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/f8975eae-e63b-48ab-aae4-28f68b0eaaf3.json and https://artists.proofprofile.net/proofs/artist/f8975eae-e63b-48ab-aae4-28f68b0eaaf3.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 0xf27e298681b2174c4c7ea3e6041e639d471517bfba37e4be327846199b5d0cee. 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/NLS6R1853305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e758069b7b92432a4d1b17a310a4a7f31440e0cb8f7252d25c3c99062673b9e. 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/NL1AP1961074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49f6b545b97906dcdc4bda9fce3364e934b67428b62f0ea97a90aed3de67903. 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/NL1AP1961075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a26ea72c60a712acf954893f271bf7fdff57966c3310a84c89334d27009189. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL1AP1961077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682a54bb0848868a1a0662d8580631e864a30976bacc76f400048c375f3da119. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAFC2090739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723aed9b42a0084e28be76f2507238c6112b35a7cc5982fbd2614ca93d618c22. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAFC2090744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5786ee48469b08e10623605004bcfa5942ba5582d128602a7f54cbe286c31693. 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/TCAFP2120833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28fd0d4632f99506659b3fa4344022289662cb1103c13e5d6494137f9b51a2c. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/TCAFT2139510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a7dfff0ab4de6b61050619711d80b3f27ea398f6ff4206b8bff3dfd3b0f173. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/TCAFT2139594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13666f7cfa8a17349b14e343d6933d156cf69512321fe359cd9283accb36e329. 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/TCAFT2139607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31871673aa6c6baec2cde735130ffa612a71beb8af2b584ffeeec351b873be4a. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/TCAFT2139634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129b780540edec4c5b500114181b999723c3828dc95fe56d1257bf262a688e6c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAGE2292211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4e79d74b56d1ea29bfe141a56dc1e2ab1ddd2f5201f619ab7b2c87a1a8276a. 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/TCAGH2219650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6b29ff040e5aab10984851b5473be06847fad411030dcdd7ad626f31f32fc7. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/TCAGJ2248110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c8cdd3e4064a33bc4139664152c0b0e9b4fbd70cccc42395897a4f9bc0ec76. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCAGK2271842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00c7322a1d8f7ac71dd729071b13b14b32db0506194a6527fa3b8a8b9177510. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAGE2227820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2361478a311822f9ae5b33bd2a4e78f75aa124df2fe983e7cf408e7f8f2b5898. 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/TCAGK2271886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6b29ff040e5aab10984851b5473be06847fad411030dcdd7ad626f31f32fc7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAGJ2248110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799db8464a82b6655a7c8dfb78fcbbc4a121174859b92c242d9c12c46f46b986. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TCAGK2271924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8e31ec1750c75769b3ddd08efb287a174923ece98a96f661a6ab8504500e8f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAHX2470667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c4e1af3666f0ddd5f39438cd8aabc4bccdf53a5db8d9c758c8d63a9ce23c76. 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/TCAIO2407780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af40fb58c4788ece5dc13e2d39bfbe757cf74db8e06a5ead23ae4d194a6c770. 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/TCAIO2497098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfc1696893e3af6852be0f15ec46bc8ab161561bb65b898e5f026569d736f46. 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/TCAIO2497123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c4e1af3666f0ddd5f39438cd8aabc4bccdf53a5db8d9c758c8d63a9ce23c76. 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/TCAIO2407780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b07a23c4ef1febcbd28a4e3ce0d20952769c7858694fa373e1d8073dd00087. 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/TCAIO2497206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eeade655d622a9f681a99d6913e71fae4d777800f033414fe59b369737f6e55. 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/TCAIO2497243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6d2b3b26c99e20f71a9c4b2dfba6f90eb1443e25df6a6166012ec022e6c5fb. 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/TCAIN2498623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d111a618e1d211815b1caa0ddd8fcfc8a3f1c5f7b2059779aa8ca6ef2b53568. 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/TCAIP2497269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44472c7a977f0884ee5b9362d396fe33a1ba64cc65ebf621614bec4b43ab138d. 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/TCAIP2497281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946f3f199024633b9b005973078a0f7e21d43dcdf1b2f5e635c0aa4317be0ff4. 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/TCAIM2451871.