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 0x226f688796de346fc3ca2876f7335f5ac787ffde4e4cb82a603d366bd7ba47fe. 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/22121c89-65cb-4e15-876b-476f06e4ecb9.json and https://artists.proofprofile.net/proofs/artist/22121c89-65cb-4e15-876b-476f06e4ecb9.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 0x3928565d7e95384a90018a1e0f50ea4fe7927bda2b485d95c6a92b2d2b3d6641. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GB8KE2313261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b573aa777c84f7bab87935a3e9e8ec82f59704cf6b1c5c5fc299e710b3e3341. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GB8KE2316339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda2e8b855a1e83a83b2b662ad67a4804be46e8cd60ddf7871a5034c47eee04a. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GB8KE2326220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc3fc87c09e77bab300bc4483590410e0cbf85f5d053d40b3a66b7225c83416. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GB8KE2403329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc3fc87c09e77bab300bc4483590410e0cbf85f5d053d40b3a66b7225c83416. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/GB8KE2403329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9d859ddcf8616358f1d9514777144c58c2666512ea21d13bea01151e4dfa50. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GB8KE2403331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73cc98679e3c7816f76810c500ecdd25ef60392e0543ae13b8a497c10d7ebd9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GB8KE2406593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc5a47bb953e1bfd451cf4d9267013240fcf2d3c5d9ba06eae7b7ac6d4d3d02. 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/RUA1D2460981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5e5adb28f975ecf313f0c9ca1c89a8627413282320c58905503d7a430ca903. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GB8KE2411258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04bb12f6edc3dee943c69d6e6f3d39db2a59201323eaf59436400fb991a2625. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GB8KE2412104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a34634011549015b6490a2b824787b34b3ac12da1552501118bec9c34b0b1ee. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/GB8KE2413694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1b6f813ee15db0d316a6525a068bdc9c17598e097e1a3623156930728cc9b6. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/RUAGT2490183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3851c14e30cedf87e7057a299981c6e769ca9cfba8bf1bd9c43c74ed76e8fbb8. 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/RUAGT2490972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba355bbcfc4ea7dfa0df7a43fc25c37082cf7979d86d9b8df9cfe6d6c91de3d. 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/RUAH62402260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f32afbf951270ed8bd6543883436f0c8f1bbdd23c662d9d7e9c70f3646f9ec2. 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/GB8KE2427797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f464debab0f715564b29ee4b7768f80fe04581383710cbb3f898e8f20a002a8. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/US83Z2422476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691529c8ffbf1562810b5c604cacce05af4a8db775543105b48c2d9a89a8c87b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/RUAH62424703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48eca7a30e5293152f5bbd2298f7fb3e5009bd6c42103fa3dede231eec0ea70c. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/RUAH62428112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572e0fc86f7e435ffe54294660722dbbb201818b7c18d84c1165091f9583d3d6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/RUA1D2507231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6981957a35170e70c4bb2ca3d4a83719023aa0c79c760c26e1363ad7f7273a51. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/RUA1D2508824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14a283690ad6ab71e8beaa2d28906c7089450f645d227df2a3fb24967c03207. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUA1D2524591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb26c19492bdcc769f516f44e7232282cf937ab6c0d9bcc0d70c76b69d7d70bc. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/RUA1D2526031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cad1b96cba0082cd16586410ce5c474a6ff9c9ca651911aea26c00bb8aec01. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/RUA1D2540353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe248507ecf84ae812079201995d1509fca21b7dce8c6516f1afa6f006f3048a7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/RUA1D2540355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf831908832e5e36716b88cf3c2aab62c43e7010850b4420e8ee8c1fa70b7a7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/RUA1D2540354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8df11a9144c83fd20589bd28732cb2e2597dadd2e70d5991f39a86e3088e532. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/RUA1D2537456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dfee1dc2cdf4f0df41aed4a22b5d66c0781a644768dc2f7954b62534ce2021. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUA1D2542127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25c6d99e22738ac654d561dedfaa09552fe5f79ff53aa64b8b9a3fde1dac1aa. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/RUA1D2553475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9d2765411f3e887981451eafebb44a2b11ef6586b3203be6f144bd94bef60d. 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/US83Z2428270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672219023fbd0348f175dc5f124d937af869bcfb3ad61ec27b9bb2d7cd0e36d7. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/US83Z2428273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f03a8a296fb3264c405cbdd1509b3706ad21157a506651c0e1eac3b7a8b073. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/RUAGT2513403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe676e6f402c79de91829e7a7d80e2ec9d5c2686afa7c7f47c41cf290d176ab13. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/RUA1D2597273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff38fcf38e3c87ba23c1b0cede529b28c12bae713be83855f4b92e32ca02d06e. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GB8KE2520741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76280f7f1bd45e9f06be9d48b4a4da4342eca75f6449ac5cddcd32347c90d300. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GB8KE2520738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6f314b20f40b5137562a24c1c4cb80790a6701925658aa3bf68e58deaf40f6. 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/RUAGT2575767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba70ca2adb03121f7934c57d1f7a14ce4d902f73f41aa026dad63122bc69019. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/RUAGT2587139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883ee842176cef9a6c04daf6f569ee466b72c03660d648e590041fa3f1b03b45. 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/RUAGT2588995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a7936c2bc3ba3d68b0f23cb4380810ddb6927f80f525b40da67ec159ac717a. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/RUAGT2593876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41848bb1b57d65c3e16bb78d0ad2c6e7e345328c30ce674f7cca5219b84a2ec. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/RUAH62510653.