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 0x691793638830405dbca1fc1f43a641ca8faef30a26eb64fbf5a23981af6aa860. 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/c264d94f-372f-437a-a5fe-89db93b5b922.json and https://artists.proofprofile.net/proofs/artist/c264d94f-372f-437a-a5fe-89db93b5b922.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 0xe4785612f6c30c74e5494e3f67d08d13fb7fdd4f5f4df9dacdcd01c798d99620. 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/US2X91300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82346072e8ff4a39e549ca4e2d4400c8799bcf48199db2ad3e22d55f1967eeac. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US2X91300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e6187747c26477e4fe16723dbe35c8f48768c8789afbfb26009ab3aeea22c1. 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/US2X91300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d82cc0650f8e7d3ce9078f1c8e1f9d37e5280e61805539886a24a3cd16a087. 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/US2X91300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6f19a24b1b1af1b471aae7a7a8d8d674a53b087125ae7635500683097f3f37. 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/US2X91300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9241899104dfce6d7f4dcf176071c251ec7cf7d4f6dd91999594113fb0e6fc. 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/US2X91300103.
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 0xf6bad257bff2f9ea95aff7fe2a8cecff2a0f5d957e790a4700f6defd0b23de05. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/US2X91300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f537717fa21f90776b390ea3330e925903a3d7b38b2a1eacdf25f536197113. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US2X91300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf189d1ac2109635646fc3c4ac69ed009bab914be41883c02d17731974959ffe8. 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/US2X91300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bed9ed7307fe5cbd344668a98198eae025533843d3992dc8768958368f8f07c. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/US2X91300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61822749be8032d9c3c8a20dbaf4ca7eda59b528c5e4087a871057a5ec02cae2. 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/TCAEQ2005765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bd48f6e94555dccfc96a34e5e3aeb53685fcc39aa239086054603a8cb0dc8b. 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/TCAEQ2005810.
Anástasis. a Journey Through Old Greek Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29c918e2b28a17d83b10cc93c8566e29446404ace51636bd147133b45406c71. 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/GBPFW1200296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853e951375839a1c128ab78ffe8c12065d34e6f896081b33c41421ff0166eef7. 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/GBPFW1200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223b309c18bf4876ead7ef836c00a321bd4902d93b9006a938785da7521f3af2. 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/GBPFW1200308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00bbfbd0da70a899bd61592b01e95f3a718c39808683e5a4f739547f0e3604c. 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/GBPFW1200309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc9346f09e127c06fbda94041365cbf27680265d5a46aab3d8a9ec05bba506e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH4211800140.
Balkan Voices Part II: A Musical Geography Of The Balkan Peninsula
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacec5c2f5f7975384f77bae63429c6065e5b5a7b3b624b2c2054f600dc638512. 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/GRFM10400152.