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 0xb60d21606ff6e17db3b95bf232bdeaee7a45b8aef095c1106f7b1e24dc4321aa. 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/dcab3d62-5735-4dde-95f7-c8b1c56d09cb.json and https://artists.proofprofile.net/proofs/artist/dcab3d62-5735-4dde-95f7-c8b1c56d09cb.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 0x293d3128063adcec6d615951ded3f7e47f72c8fc243ee9115a567db125e86b84. 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/FR6V81521246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0658be5f2dc692ce3613733740543d721f0bcc3aa34b7f17e32f4d335f3e7057. 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/FR6V81521250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a646db92cf24c6e5252a8b821e64379dfd8460d253a4c6d1739d0d14c37753. 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/FR6V81521272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954921d2bc77f977e55029071d690a829ddaf9c7b82fd40c16701780bd85bedb. 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/FR6V81521284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b5b1590a2e40b7d97dd8c8c5df9040ed1ae28fe8b1148a53a596f808138072. 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/FR6V81521291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4c1a98dcd96f6970da0c9d8dc4ab4854fe512ce684face9f79c8238d703773. 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/USDBB0951480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3ec55f5b2fa9b3461bdba41650b8cbabdc7050f8ea56a161c407b372d3d0a2. 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/USDBB0951488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed23dae63637c5de4a061a98e76234184e455811ae53330aca9c24e6ca2090ee. 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/US78T0504132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa240f1ac0c32040f25ab219816ac451e787f477b93f0006afbadf943805ad2. 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/USDBB0951482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9193bc39ed53a4311ad666f1882c69dbf2c7c4329b50151af8df87f023ac4992. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USDBB0951485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9372c4fe82d7304b872134464f18c24e07bccdf9b091227abbf756825aee5b62. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USDBB0951479.
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 0x3b2dd706afbaefe38a9ec4d93a80d7392c8a78e19f4d12d82df38713fdedcf19. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USDBB0951483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeec73937e76787a0b5e068106528214fa08fcda735cdb95a32c39a9dfd42013. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USDBB0951481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a974a5e6b0b278324e58cee84fa0f9c6c113cb77cf89a44eb440f83d88984f. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/USDBB0951484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6544ba6298fc9cfaa73fc2441a7875a88c821043a0caef711902e8fc7b9195e5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USA371027217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c63384d68c50656cc535fff2591f3c8fda4e7b7b4bff41dcce1f467cc95902. 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/USA371027220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf835cf7b6877e3ea03dfc81f896a30f64d293276518f486cc5fab65fda7a32. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USA371027233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249bbdcae85aea595a8519666e3fbb1e336319fe7e2226d7a41441a4998e9c3f. 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/USA371027236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27108424452685765efa59bc645e57bdfe8e394b2501918ac5f80a0f589089ee. 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/USA371027241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302d6e2c0e2922ed6d5f220e4a7fe9846c2660c179340a3b1394c35a494e3cc9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USDBB0610539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d25a893274ee34e207940d19538d69a3595c0e277be59822598048f68a7d3e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:10:46Z), 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/QMDA72291618.