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 0x88fb654c39b908bdc687fe80996e669a46e347e9bdc84978a806dfaaa4b7f6f9. 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/858a7d45-66a4-496b-aca4-901b9cbf41e7.json and https://artists.proofprofile.net/proofs/artist/858a7d45-66a4-496b-aca4-901b9cbf41e7.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 0xe0310da346ec9508c0af9c2300f0c5a5472470e59169dd6cd3fd1b40313bcf05. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:06:10Z), 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/GRS010100436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f33a54982470e64922ccf608f895ba0f5f8a2a244e9812dfd46d78d6bfeb98. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GRDK10700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d6124fa148b879882cc5cbb65715921f1c4a8521dcc4e1a46c6541d3ab8d89. 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/GRDK10700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de16deaa65174cd036bce5fbba81755dca59a58a8e4bbb770488d8f6d695933. 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/GRDK10700012.
Balkan Voices: A Musical Geography Of The Balkan Peninsula
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4d62854ac1f03ebeb2cca4bfbb345f0a5cf1c1404623e7aebe7ffa29f3544f. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QM4TX1556064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0d8788dc0904d53ea26ede543a79def15e55a7da3ee8b337f4cc4197d4fa28. 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/QM4TX1556065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e00b62a5af851a0ed294856db93c3629a570245260bd47509ab81a4cab5b07. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM4TX1556068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0593738f07ce06d7017971f56f5fcba54358261633090c35f1c1d4664a70cd0a. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QM4TX1556070.
Balkan Voices Part II: A Musical Geography Of The Balkan Peninsula
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a46e4a28786f5821a2176b3dad0d014990a72c3f4bf682f4e67aadc36bc1e94. 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/GRFM10400144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d82985f791c76d075b450b6d3769e51de00c0e391209dc6f31f750928f146a1. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GRFM10400148.
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 0xe5ee356c417526cb59b125c3db9f423bf5658695e291ae72ef1dd68840c79401. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GRFM10400151.
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.
Balkan Voices: A Musical Geography Of The Balkan Peninsula (20th Anniversary Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e26266cf0e73823f2686fbfbf5b552eb7cd4b9572471482a795790156efd53. 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/GRFM10600167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e26266cf0e73823f2686fbfbf5b552eb7cd4b9572471482a795790156efd53. 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/GRFM10600167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6ddb57dbbb78c9274ff57cb8046b34ff98ffc6e3427aa10b95f5ab28352011. 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/GRFM10600176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecd94ba37a21f6c2a81c4065046cc7f51e9dca5b3a81d7cdc287133d5be38ea. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GRFM10600170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a45dbe1d17f4749b337fda2a1a8182aa56ecd9b18d3dc80def1c668b19b4b68. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GRFM10600171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32458ad09f0d0e8c423b89eb091dbf3cf0447c91c32a2ae9f65f8b748a4d137. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GRFM10600177.