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 0x67f5b644a6044274a0da704040ed2c2c614e84d00ae9eef58829892900aa965d. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2614ad65-441b-4514-9807-5cc68d935c5a.json and https://artists.proofprofile.net/proofs/artist/2614ad65-441b-4514-9807-5cc68d935c5a.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 0x91a77a6db829f13111368e4c993c99c36f49b1bee35132efaaf4120dc44fa1f3. 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/TCAFI2158832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e11fe6bf5a30c368715164175543712eb4914609dcb05e78cbb6dc2fe061f62. 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/TCAFI2158863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24470638178fc0ad4a7bd6b77f6a800a47e66d9aa1a1ccd895809d9bf1301e70. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:41:16Z), 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/TCAFI2158840.
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 0x7e851235cb4974a416ea2e774a0204af3dec823dac4f08929afc318d7c7112b2. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCAFI2158848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d267e750ffb61288ac0b8444528b3356914e1cb1a296dbb5c4a34076b6b2c5. 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/TCAFI2158850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2015b35999181ad7ff4849b123e06d6e887a6ed079afe654ca175d5ded53a60. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/TCAFI2158856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b65c80e8abd96c7420c40655fcf299915d8d38bc967ed4f577b04b4c497f02f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAAS1027157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f98d4d38910617ad12bf4bca1a26758fd396f05fb17645ff722abdc14f3a33. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/TCAAS1027160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3f8eeb2dc2cd6a3344304a77be06d635078f74ad1b1c2c678efbe91d80a516. 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/TCAAS1027161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472f7a6898be7a2d01901933628b9c72ec11d1da07baf2c25e2760d48c3e34a7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAAS1027163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bcb440c842feda369e1d246e7f3ae8a62520037f061a0f346419f818ab992d. 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/TCAAS1027164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770bcc337854cd5214ba368e953e15e3863554c896954889de3fefbc476063c1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAAS1027167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8754a5124535ea756d808631c5fc32187f194ad80317d1cf3afb62e6b0dc45c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAAS1027170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4f5f4ced49fe8214782a0d2a067cf816e71c57b50ac332119fdbca8a9e607d. 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/TCAAS1027171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35bec792659cebc72ceb63f9f585f532e1cbaa5811f504d8ccfe2569cf2178f. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/TCAAS1027158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfe16d97b805a7a30a7d16aabdc61c067f3c012a025e1f818577eae4a206c32. 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/TCAAS1027159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbcd52c54f6364762a1bb4581126b021396ccae7e1e97b8fc88d62b07b2e430. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCAAS1027162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd973fe4f048883f357a818a5cd1efa2e43b752612326d51dcb29da25cf4907bc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAAS1027166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0487ec8d2a87ecfe2af6cfd0087a70e93a913cd733bba9f82457d745bf7b4b3. 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/TCAAS1024604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745daf4d2625787f709ce0c744760b77c82a9508cb6320ae94c1229a9917b62b. 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/TCAAS1024607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bdc7fa5ff36b5aa7b9748b1685487643cf36fc9f0ee5bb502abf86263ee186. 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/TCAAS1024613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e1db89fc8f818c4c0f20b672aaeb384dad7469cb6c36e0b103308036adf617. 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/TCAAS1024615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8d3e6dc30a64c45183e75bde3812a8d165b03eab59e9b29ef77657c2bb2ee1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAAS1024605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96da1cb2840210789cfc17c0dcb2639074491f23fece5b4d20a6a9f6f74ffb2. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCAAS1024608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ab4c4faaabe4bad749a39c24e1ae6ba76f97533dff2fee878f96ab49b3558a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCAAS1024610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a805381c6e9eea9690cade7833ff7a1564a155c707f97aac3b4ded0689795b. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/TCAAS1024611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97d95d90628a1e48eb4f5b62d6d51b5146d2200c7caaa6cae94f3412a1c3d8c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCAAS1024612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a4e3c8e62f283f4c06aecde01e26111c554d06ac8595583b1ec519a0882f82. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAAS1024616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7578feb32bdf962bf020c3967fc0fa31ae3d570dbe47c34bd7f27126bd831264. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/TCAAS1024617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43536ff1329a570ed6885cd8c48c47e27fcd17c464e3a9b8a3b522afcec24797. 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/TCAAS1024619.