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 0x965fb332d91c50c350a1afe654ef48e5c7cd8681b4a92f9e4752d1a5ec02bc16. 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/2fcf1a95-d224-42c0-a57c-5434a1f91761.json and https://artists.proofprofile.net/proofs/artist/2fcf1a95-d224-42c0-a57c-5434a1f91761.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 0xa335ef4af81b2c8752c65660febed842886af20dd3700a66d15d77abbc3c1d02. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCABC1128450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761d10fe6e7881de159fbed182a23e1ff82f3ec4c59b5fe1255866e99c4c1dce. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCABC1128453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6608b46280478df4ecf31425b191939560d1b9529b7c8d25322f8605075044d7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCABC1128456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8930f46e017629f03f1a8e1f23c662b61a091863934a58817bd9f9e8434917. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:53:07Z), 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/TCABC1128458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe822d8ab8ed51656a833e4f72bb098afb4169c9d2fbe23e6174eafb44399ebe2. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCABC1128460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2f648c249c8a279a69127003863b5da9a6ca74f0a95b09544311dc682567aa. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCABC1128462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe629b48b6498d16710af034c013c337ca2227b2fa4a7a0f61aa2dc8dca5d95d. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCABC1128465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a740364ccaa3f0110bbc9fc4ec6666893f1d548c329685d394f9632a78d308. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCABC1128468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28537040f2c16041127eabb45f2261f9e9441db472d579c37fb0a255836a953f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCABC1128470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1915fe1eace5f39920671331d94ad36dc785d86290a335e471ef4c5c2cb09f50. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCABC1128480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa419a6dfc5ac76937db50b9c3cffa39c2a3f938314a212aacd17631088ce280c. 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/TCABC1128481.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa5e084f4f5f05e1fc62cf83777cb4b7ac56cc0183da235badc294dc61a5cfa. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCABC1128482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc9d6bec15fc5c6e556da47ffdf4870b3373780a04fafd02d4f5993fa9013e6. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/TCABC1128403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5a2a8838e20827ba08ae3e7cd43da509180b4b5d49898fb32d082995d7b828. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCABC1128406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5923a7b6abe2caeef3cc8256c0c09c47fd76810d74623c4fd280f2d5be37481e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:43Z), 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/TCABC1128408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693129347b50fe81fdb2ea1997694862b6c1800d5d4cdd12d813dfc5d51ff9b5. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCABC1128411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cceaecd7391fcecf4143704f6d52c6491a81800694bb89e06ad1e9de2fb3a33. 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/TCABC1128348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481c2fa6bf437fedd9bfa98c0d57c5a5c423a9f52799d28f87561f262df7641f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCABC1128349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00b7cd77414694b992cecef3d5066f2bf7cb7a533072070b0f77d27611977da. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:23:29Z), 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/TCABC1128350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a67b9894ac1eb546d564ae3c63d31819141c6be8f235cd4e25563276e8ca09. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCABC1128356.