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 0x7d94bc17421998d671fd2353ed9697315abe8842bf5da91198243e83bf9d46d2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/284a8a9c-b681-47d3-844c-8afb8501e616.json and https://artists.proofprofile.net/proofs/artist/284a8a9c-b681-47d3-844c-8afb8501e616.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 0xeb386f6160cc61adb5afff62a8aceb28834a8828abe504df9117707fa878539a. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZNWS2015057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f82a524abf913b2e0a153f13443fab80ffcfa0ab95a8c78af19c9601dbdae6c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHNB2153148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d274c5fe50848c15b15636b4172b26c396ae1ac11cd1928dab6a938e0de64f4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHNB2153150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b6de1f39539de030e5576e43c288968f45023909bdb417d70aa721085e5346. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHNB2153152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8390ae3125c85a461038709e4b673e54b376dedf300b605ad39bc20f659aa6. 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/QZK6H2177104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d77183c3d238acc495622ed2b06a5fdd6a676e92ec0b326d8dea6c476da2890. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZNWR2162836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b3d5b22a6c1c3ae0a4b2a8dffeb980ca5ef6542f86aa9c280a7a9a48e2e929. 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/QZTAS2198277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589e12f8e9d41ec32db71592ff11af9f43588c8b1c71b5979c916a7a7089fa03. 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/US3DF2224545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90dbf4020f46f3d2736246d79f48b6ad694542805911d9800ffc1088d26c228. 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/US3DF2243016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78437aa6d795c409dad6b04f6bbc0a5f235a7ada51ce515c2120280d76c49de4. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/US3DF2259287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89628c1ab6fc0ed6cb68de2774f02526a2567aff1a47a020016b843f33b519a8. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBKQU2339299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68e27f217fa5d98054f3abd00e03e0813162fd8808d31be38de892fc326ef83. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/CA5KR2451078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84f97f107d912c7c02468cda29fcce9772a7fa5fe2abc9de4bc00aa6929cdb9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CA5KR2460737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579ab1bb93fd2a68aabf4220569434682d9378f0a47893e2c92c2c03be61d736. 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/QZWFG2485993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3523b874eee6a07fbde8bdbca6c1f2e6d3bdb4554fd93ed5cc77701b0b38b670. 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/SE6SA2487775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa368f072dd51b40dd27054f7b00c178d09e8308a299867c6996731b3515c7e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:31:43Z), 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/SE6XY2556067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c37b4f75d49d7755f26232b949efa397ae5533f5a1d1790764cddd83501899. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE6XY2594410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ca6f07ce99f46ed43aa11688622c5339400cd3be7b3ebfab31e1dc35578bf9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:09Z), 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/CAQOI2505498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0c06696e9d04354322631f205687c11dfaadc0b245ce15e3046d5d24937bc2. 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/SE6SA2504749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a5f1dd37a4fc26c678dc3848977234ee2eaecd96f6a00ec433c8814b28e70b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:27:18Z), 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/SE6I32538362.