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 0x882811e25954ca7822477987b6c3f02568ab2bb1138173aa4042a9e689a41a2e. 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/33c02d9a-9634-421b-8e50-c302123dcad4.json and https://artists.proofprofile.net/proofs/artist/33c02d9a-9634-421b-8e50-c302123dcad4.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 0x3b6e14f25d7b483541713e2b3a8fea3d72a052a18433682a1a9adfbe8d8cd517. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/BXG6R2500262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d97a4234a097e674334e69d3209eb51527aeec5a18d5fd762c3e7ac73533112. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/BXG6R2500319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad9f93eb2bf641352467f4cb45176c74d83a3b8a1601b14156d947610bf29a3. 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/QZNJV2591141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a31c79da27477301642ada9ceea931b6059fd11059e523b01b1d8a21ec34de. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/BXG6R2500369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afbe16908b23f5166fb01d62f7981350d38744676510f3787a370d0ccbba0b4. 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/BXG6R2500272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b25b0a5a1ade96fbae8c8d0fc1df7988830ed20687e5ad8d5ae357a5795e8f0. 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/BXG6R2500252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee6449f53d3e1a249e3b7e4fbc49010420280fe517c0cb33e14843f665622cd. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BXG6R2500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe332dd8e58be26824482c07ac52ecb7aa3a185ca772763a62ebafd4ec3e2d8a9. 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/BK4DA2513633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3786702e61d980c3442f357a871577400877194810c0ac203ab4390225feeba3. 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/BXG6R2500222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f93251c36e1bc0a81bc85ac5939b513c026f4de3d45b1860d0e716bdd6d626e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXG6R2401103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75c7fe0440f43e8eded3a69f13fd192e7154d8c7e9366b1713d226f586a7904. 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/BK4DA2513641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83113f4a42a11cf2f45f0dc7ae489cce905123d9fa3b99f3f16aa8f470011c85. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXG6R2500216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2b2a88c7efd5b0639805b4940e5b12b12351dab0091bb4eb1e83c0999a1351. 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/BXG6R2500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb6936fd9bafd122858f72f792af63d47263f0f79ca5ee9bcb320c678fe8132. 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/BXG6R2500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3561911a23ccada41ede9f346e9e0b963afbbad3c59cc5d6fb997d113092d5f. 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/BXG6R2500159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae96d2c746646fb78b128a473f9a12ebefb981aa0a38fbd89e89ad0a214f187. 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/BK4DA2503104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593697368d0031e9a10f665cb75869bd3eea335bc1171657195d504db4ad322b. 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/BXG6R2401163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a65f815d9489e167becc8c7609ba97ba3c60f96e9f35dbce6797c5ba92501a. 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/BXG6R2401164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbddf61d20c89bd4a46008275d9bb88b494077313a456f8c8dea3a209f14a850. 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/BXG6R2401165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b03ead8417bcc2152293c26ff88b3f7846abff7e11e6fb2d53fb942cd37cbeb. 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/BXG6R2401166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a25e5469ebaa22fac67012907c124b462136a5497e6a2a38bd019eb3db7437. 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/BXG6R2401167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59af3d9c7abf3787ac1cf511c55444d72d65721e22877146301d418934e4561. 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/BXG6R2401168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493c3510a33a2613a33189518b4540382450bdf2d8eba5811ef0c1a5ae7c7bcd. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/BXG6R2401139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d014c1954b3f2b98735da24fe4065a9f954c37482ef88aab5be94aa3a6643d5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BXG6R2401131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324543b749f8132b46c9abb3288c25959eba3311d2281af56d5a222435ecc959. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BXG6R2401143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2424af81db1882e989b1c4de0dfb257eaf6c83c3c8933604e413dd830aac19a1. 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/BXG6R2401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f66490652b26a2e3b2eaac947ae122dc273404b2012d5b398a654fe338c083. 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/BK4442400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0329b4dd7660ad83648c56873aec2cfee69fab997b881a6c5c2a931737a1de5. 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/BX8VF2200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8419ad980b1b98557d42baf0dd95daae5146789c64bc735265d2fc83d85d5c0a. 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/BKBSS2400322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffda43d6d90d8675ca3d61fa093dd499cb458acfe1e507fcf85ecb300925ab6a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BXG6R2400577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8a6aae600486b902c1e86ec8e77bb3e7d9038c9080d2ce1963511ddc219b83. 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/BX8VF2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d9dd1f6eacca08b600b0276e8df0a7c5c5de2b647d8089ecb5814af7b2b4d1. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/BXG6R2400591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753821228c93e0b43e2617c1f2adf903b7571ebd8cf036c8c37fa56c0357aea1. 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/BXG6R2400495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784de2453301a679c035586905acdb0e5d7088c7893bdd5c21c9cf3033458b9a. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BCNDT2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe970840dbde3194e78409f34c9d4acb3a243e63fbd69bb59fac006ccf07a3155. 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/BXG6R2401170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1695dc4393ab300582428c08f1125dfd0557ef94fba6bd2497035d074fd373be. 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/BXG6R2400566.