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 0x7a89255e4756f189069b94f3bb145531e51f748b450614228170f131502872b6. 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/39d2ecf1-ff03-4893-823b-a4c963aecf89.json and https://artists.proofprofile.net/proofs/artist/39d2ecf1-ff03-4893-823b-a4c963aecf89.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 0x9a1d5782f31325731256b4862e15348503532ea2b7cfd4671fabd0c37f2a8c12. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GBSMU5550807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cf89a170edaa6a3651de30ed265bfcb24e35cd8bc27934d7be4985d8276ecc. 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/QM42K1990634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f40481a2c999ef4aa296545be6a9b1b708a22690e3168f9beb161a205d5e57. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USA2P2024692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e71797c3490c70360bb2e3e697de58a25286a921e1d32aab963b3aa47b9c607. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/USA2P2038313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fad0ce4c77a69d994e20935732e4101d176d1c26c7427a4a7b360db3961f1c. 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/QZS672122082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a46ebacef282bc78a8547f630bc6371caf0593e00f0d16acec8abf66c76ef73. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZS652150264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc766ff8d060b34b2b2c2e2db74cbfeefb5999dd6c3fcb68739dcad697087ae9. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USA2P2137082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ef602c84e54d9119ac5f94ba836afc24285b76e529e03d5186f46c7627516a. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QM42K2211423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1d7a1d39b9966cc8490fe276d3f367480148af82b9dbce4fce00de5f1e2fe6. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZMHK2239208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fda42e35f36974e6f10c44df819626a779c672fdfa221ae29761fe6afd0c51. 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/QZS672243282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2757efeedd067ec1948ce82b366218a318a9f0f502fd02b14575308a1b4453eb. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZS662206154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9a67f49d2fa74eab553f01c8688e956d900f0217c196a928739bfcadb3110c. 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/QZS662247965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56105d844e86f55fa2024a0e10e095b84f5c5b67d1aaa7124f7ae7e392d87c9. 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/QZS642249349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6a48b9d865312f8da7d08cd17c1f7c61474af6ffe650c80c36d87d15c970c0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZMHL2401287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fa51d7de4c9608842e93ab8d47d60172f729a9f0bbc267b01a7a4a2798006c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZMHN2468511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cbf0fbe1e9490582677aa746f60c50b1046d682d755c0a635b743df70c8cde. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GXBDT2445027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6215672f976442791ae39fa9daa98e9c0404adbe65cd39340053aaa37c8014e. 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/GX89G2542780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2caa14fb7e69121c12a3e88fcc809a44061e6d4f1cca92204dd7004135bb7b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/GX8LD2520330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0a6e8265eb5f5cdb3ad902a517aa70b9e09d14e3775154f2dbd58e26a7cb42. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GX38U2568703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e56f29432313944ffc5e4df113296ac01c68e7c6616b53c85a99315762d8077. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/NL5UZ2513784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4210fbbf2c009b97343533abf1a70eba18d841afb8058d8c6d63fff3ff137c7. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZS642216038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba601396fc3db2b69bc8e760a639bf4bd3f235fdb687328c916d46aba1b82636. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/TCJPA2477281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5672e8e5b9fff5a172f4a5ac7a27d4e62743c6ce94800caea6e4ba7915b02f56. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZMHN2488434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0854545146696ee7fda9dff60c0ad840e34bddedbde1943019d44dc2f3ffed70. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZS672451982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fef6cb49f60addf5a8950cafc132afa7012b5c803f6a69aa55b4e0704c7f107. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZS662441834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b0703a915da8ec1808926bf439b6ee96c02009f7419e7f1eea09bf8ac29aac. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM42K1992423.