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 0xe800b91e96139025b47a2825ae5631566dee4c6a245b1d6c3b4a7f692577aa94. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c2a725f-b785-4600-bbfa-f226c025b30c.json and https://artists.proofprofile.net/proofs/artist/1c2a725f-b785-4600-bbfa-f226c025b30c.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 0x149fe8d253deed6a7f7d35bf9666d433f5b573cd844a62718763ed5cf4c09763. 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/BCB6I2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcf257ce602abfe13951293b0ea13a96c817349c30d6a7270e6902d19137a07. 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/BCB6I2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92c08778b2b401bd7d9cd5613f6e066545a59a63a21564d6b77faed84b95e03. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BCB6I2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa841cd29c9033f38274749d7adb53a1837a234d323cd2e8583bf1b57a0768f3d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BCB6I2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14549c21d7609838b20f1509d83184b531b87799618bc1cde13ed065f9fc7f13. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/BCB6I2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689f68e499060489b307bccd0d5b52943a64ea855ce2e9c340b5b8a02d9e15f2. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/BCB6I2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78918f4329e8ff350340bd75d6a14316a1366dd7332c39fcd6f5929a33fc0ad0. 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/BCB6I2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c5af530bd86e52638dffaf01345d722ceba4070b1379ac6bf686e021578b58. 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/BCB6I2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ae86c70ebbc19f9aa8589799fbf32fbf8a441eba06e0e027ff04dda25e6cd9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BCB6I2400002.
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 0x816e5b65d6325ef1cc9432b5375559bfdf2e98da6ea8616353922294b4bc4ac0. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/BCB6I2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcc6d3c45456c43cdec6b45a48e618c528167a1fe9f570157b294a57f64d269. 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/BC5FU2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ef9cad533f98b9f4f1b5d1ebcf61a8e081fbb05a8610f416bc5c3f78f79d49. 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/BCB6I2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5468211637f724522494890afa13f40845ebdbcd0b53ea7c43eaa0b076b2fa1a. 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/BCB6I2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af9aae1e1877c477e3861a0644959854521023c91827bb9d7b7e51420695887. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCB6I2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961d0f43dece600fe85de3a4088690fb88c9768bbc79fc3ce169c25ad5e35d9d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2072231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7557efdeea881fa0566bebbc1ca926a9ffc713fa49db878f6da9e95fe4e2e4df. 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/QZGLS2072232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e400e12dbc7c506824b82bc496d718e3e1317ba86dab9cb239ca41ac631956. 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/QZGLS2072233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b953159dc2e47b2f363b817b262ee57842e68c860621b0075d2fc528d74823. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZGLS2072234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75938edde890e8e948e71da559fa0cd1d51396289327982ef5b0660368964c6c. 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/QZGLS2019552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8913d917474716e672b280fdb08fa6ebc80e160251f61dced5905054b17a3b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AEA0Q1827873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba918536c490116ba5e67df57f8b09a7eec54683576548512a245c11300cd2cc. 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/AEA0Q1827870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d07d877a0af39b1bbcc783f97c1993cab9541ed83ecd153e4ebc488107baacf. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/AEA0Q1827871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61c75d71e52f6451eecfd11263de3d42f3efc657701638109937cb211420f92. 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/AEA0Q1827872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dd20644846c7a3c22ab1a5f513a96283ad06ec2466b4c05517858d039b7d80. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BKNBN2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ca8172a793bc5bde06167281320c382195722e9881362bace31aea7b049717. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/BCGXA2400009.