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 0xe41d168cd2f1e1e37a371e4c38518964be3577e3dcfd4f31ba459ddce3ac49f2. 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/27c0bd22-f4a7-4d78-ad98-4bd07973fe43.json and https://artists.proofprofile.net/proofs/artist/27c0bd22-f4a7-4d78-ad98-4bd07973fe43.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 0x7a5f745746cf84e0192e9671598f10e18da0f0cfb039a3e71be2b84f1b52e685. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/NLB3Z1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6606681650bd909feba0d1bbde3e97a744b6a0bcae2ddac20f8f7829ca478ac6. 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/NLB3Z1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5cc43347e7148f6c12179c79854f37e8d8ee71e7814f75014b8b70a7f96920. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AUAY21600232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39752ef2660b8cc4854c4dbabd591f48e94af2166498752df5cf94d733f39992. 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/AUAY21600229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe102e1d7b8186524037ba3a5d002c2e8625f1a532e0198504b1aa69a1ad6d6a5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AUAY21600233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfbc5186d14437b89dfba380c6a868512e2954b4be5e48a5202aa65f20fcd96. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AUAY21600228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814864cd3b22155d3b7aab254da6e3729722f2d793642b2744380fc32ffd4efa. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/AUAY21600227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664995ce9b6f926c86cf193d1a1616953eb490d6ed0650563a8e807e6bda2c36. 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/AUAY21801345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17166ddbb95d26fe4ca59e1e9f9bd4b32eddeaefb184a5623215f6df29242eb4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AUAY21901378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14143dcd516f8174425bb28b4aa2beabe5bd0df2b128c18cf590ce15f38c0b08. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/AUAY22200000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312c21284377bd07bbb3b488455605b966d22c1db7a59951d872c32462cbe37a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/AUAY22200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911af953e75eba01862271aedfeb46589fe620348a1588ec84d90408ce00896e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AUAY22200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d6a497d306a58de5b6429d49774cff848184d2b1f5f1623e758fde3bc2a35e. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/AUAY22200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e56a83fd079cd609cc73b22ad3de97b16a9b8fcd8d3e109c4e2e5e252737f1d. 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/AUAY22200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e56a83fd079cd609cc73b22ad3de97b16a9b8fcd8d3e109c4e2e5e252737f1d. 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/AUAY22200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69711647e7994b47050a1e38fd0544af4196cf0c8e6e7c990684a2c7205cbac. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AUAY22200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481e7b94c09d5d9664a0f8813ac145ad4c923069c708bf4b1a36ca41a9b17b47. 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/DEUM70901659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15e2526fb8cc453cba57e26792276ac1e4a854d362a04b71456630846e3bb34. 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/DEUM70901669.
Happiness - The Music of Joy (Silver Memories)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2597ac65ee0f518645590c836f64f8ccbb04f9643bad30f632d1753b8b1e23a8. 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/DEUM70709249.
The Royal Choir Society Mastreechter Staar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ace18bbf299f4516906bc5976bba5feaffa6b841b8f396dd172e01d91c4897b. 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/DEUM70502996.
Concerto pour une voix (Arr. André Rieu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc044cc47c9d0611d2da6d6be529f8c4cc7c42fb1b69f5567f10063db62534f65. 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/DEUM70709233.
Solveig's Lied, Op. 23 (Arr. André Rieu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718c26af1308253cd6dc792db9c9ab18cd9934dd136227ded6bada4accaee6ab. 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/DEUM70709234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd119f558474a4de69283b2593b2675422cf30d09c8caac0d886a53a7928f4319. 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/DEUM70709237.
Someday My Prince Will Come (Arr. André Rieu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3c57f009aa37602fafe960d13addbc9162d4e0fd4003ba86652428bd66cf40. 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/DEUM70709243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2597ac65ee0f518645590c836f64f8ccbb04f9643bad30f632d1753b8b1e23a8. 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/DEUM70709249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8146879f344aa022972c028e93ee54d3f1daca84f25e38153a3b0b3b50ee073. 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/DEUM71001514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539214fc281b6b7bff700a34c59c62be4f98f0fd0e485206fba7c672b25633ac. 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/DEUM71001513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd2642a4091929cc24061958501716429d7a037d3e459e920195a3c16eaccdc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEUM71001519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb76bc46d2e4d9b1ed993a6761a5d154f2cb4c6574ea0a2adddcb5165f61874. 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/DEUM71001521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539214fc281b6b7bff700a34c59c62be4f98f0fd0e485206fba7c672b25633ac. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEUM71001513.