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 0xfa01bd2763986a7f1b920c237e0dcfc485807fd65f97f60d0e499ea8646bb168. 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/9f906151-40ec-4837-8633-62918d4c8810.json and https://artists.proofprofile.net/proofs/artist/9f906151-40ec-4837-8633-62918d4c8810.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 0x51e7c682d534f87c3854bdf121ce278714963bb617ea9effbab9a49aff33592b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCACC1440711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc420b36c210cf9040b0ff4985d265133bd100217d0bd7320d980d907bef0e37c. 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/TCACC1440712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe2c318fec19c0952e323a8239477c8a1ec438cac35179f0c77a38c2b4af793. 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/TCACC1440713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2b156a3478885eb780a5e85689f7a0e5e730d2d0fa9368f599b13d0a1ca856. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/TCACC1440716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b64289c16dde67c158368c9e5af55345efa3eef74b6b746bca4f61b8e41bfe9. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TCACC1440717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8300e4058c2a850f5a1dbe4dcf17b286d75a57dfb6d3675bf94fa8dbea5cbd62. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/TCACC1440718.
Waiting for the Bodies Down the River Floating
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39921794f13f2d27bd2ec3e28eedd7164e3ac6c7d226a4c87c0ea025185cf716. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCABS1487266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae4d0722c8ed0d15064860cdb4089f48c9e669549e6d6e81bb12190a31fb8c3. 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/TCABS1487267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b26dbb5d19a781ab9f1bb83906bad551f0674269efcced0df46b234824ed9f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCABS1487268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fd6c47b80eb49ed091204d73b599abe5c7a79c6d041e00a47be43df80b8c93. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCABS1487270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c62040e4204067b8bc2270bfca6dba7eed53cd739a49f8a8920a965883cfd5c. 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/TCABS1487271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc46a1417498310cff3874cad568206ed074ce34af2896a88342ca039514d73. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/TCABS1487272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8db616a8528630ede97ba096d6184350ebc4353730b8246f39c346b9271728. 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/PLS821600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d49f16e63b87199869b818498adb377257fe2441a81c3e392fde5f63dca968. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/PLS821600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75997e7908ff58c0f383696a7f7520d7e16be7992f0dcc9339970138ee7b75d2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/PLS821600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b034b0d35f1512c95450f3f02b4a4caaa1b0bfe6a396d4296e359b7ef22ba49. 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/PLS821600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4969f67752db34348c19416e61fccc3d3927b25f183b22dc9e4d7823eae42a5f. 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/TCAES2071923.