1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x52eef3a22c8a4fef467b70c2f9ba1996ea371d878f04299db0c6ff3a2f5db565. 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/e8590353-153e-4181-b09d-e5d1d88f467f.json and https://artists.proofprofile.net/proofs/artist/e8590353-153e-4181-b09d-e5d1d88f467f.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 → block OTSBitcoinBlock must exist at that height 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 0x05b2fbf541d57eeb6aa269aa171010bd10a426699674515c88303a7fe07b97b7. 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/PLB171200976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d2479717d6a3871714b6f9a57dfd328072302f60ad64ec7bf0120f4bece93f. 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/PLB171200977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4117dd269a58562a87ae296bdcde9e0f067b8518fe42f3f438b91090d89a72. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:28:25Z), 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/PLB171200979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a58cd978e6c56c10a5c144d5b4d1382da90bde7efaedfd0d2c4f5cfe105f3ec. 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/PLB171200983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6d875780e9d6086e73d186d791e1dfd4b781e7df9d16480192c60ace9c91ac. 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/PLB171200984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab06e070cb4c6d43d2ed63a4fab2286675a43ff71edd022eccfba2a424b2f8cd. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/PLB171200985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a13e244eec941d3b4c6d97a3f6bf7e2abb08ee19d8887106076798a25495a26. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/PLB170801308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba5b5f488b623846627ada0317d62a5f1e8dbdb6343224b0eee92f2606bb927. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PLB170801312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7066125fa98b6d1a9d0f873898d0a2357b1e19a404f504e81258f15fb3240c9. 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/PLB170801313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4390b7c6c00ae1c5497575865299a43ba0aa0a0460f9aef87e4b0e2909714ef9. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:41:16Z), 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/PLB170801821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc6902c4aa56a0a66e6cf27a4b54ad5e435c45db61e9f30570db5941a3939cd. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/PLB170801832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08e24d656926cf56ae67da72f1e052a291b329501c9f8ea725324144416ac4c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLB171300621.
Obrazy i obrazki (Koncert na zamku w Olsztynie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7abf12a651b96afcba45c43647eaeda352fb75574d9b6766e074c426893a48. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLB171100906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a66e549271587fa7a2334fc8b5ac8ec24b86fb39d0fb7ea5d2ff4cff21949c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/PLB171600204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a17ffdc25f72e52b14e41b0effe481f488d1f541d322423962b764fb3d0f608. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLB171800157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a62ff62ab49973c7c88acd84d25f208cdf354277360d7dc34bad8e27a2c6f1. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/PLB171800158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55478a974dd3b699c89305830332ab0638d8eabedd37b6fd7867aab07936647f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PLB171800159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071914cb228501ce974f7e7d23f57098256ef9d5645da19bc3efe47b3ee2e9c3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLB171800160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2625ef62c3a0c283856494e331e98eaf80643123b6b7fba42b3ba5c96d629d. 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/PLB170801304.