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 0x4ce3090a43a262e06e3d0fe9ead8dee37a98305cf747718e264a7538fc78eaf6. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b85f8a5e-28c3-41d3-afb6-2c1efe2658f1.json and https://artists.proofprofile.net/proofs/artist/b85f8a5e-28c3-41d3-afb6-2c1efe2658f1.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 0x01e47fb8f08e5185a46169fef74e8df1082dbada95744ec0c5d951e648a39400. 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/USI4R0910554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86145abb3baecf50ca0f376c9bb8bbc19f6c2306eda5d30483dd23a4b589c1b. 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/USI4R0910555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38353576f2b9e7042c6968d64030a52dc4ffc4ea89e570fc189b16b8207615be. 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/USI4R0910556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc848dbcaf5c06c74bcdc4b15357b5cf857e015128ceea3d8a2b8f3f0f906fd83. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USI4R0910557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83d841eb2e0987fecf2719f2c7bf6e193a4bc13aa2366482f0d8414f1e07c2a. 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/USI4R0910558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c62d417df6b010aab47c78ad3a055c2c25a6076daf8bb061856f3d27cf0c4b. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USI4R0910559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd830b73726acfadba2eceab895190e26da3b1ca4489bed5e87a02dc60267461b. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USI4R0910560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd640e328d9a249aed170de7c6a2b4ed7e133c0dea991dcc8f448e20f03a1ba53. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USI4R0910561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae396cc4bc88fef1b847b45dad2a73bf784790e108e9fdcfea5b2928f4bcec4a. 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/USI4R0910562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49663086abc60ada8a310b29b5b2f3ee9f96b41f05a1b912991969aaeef2f39a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DETJ51700127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037b24c88e89c63e30eeb72c8cfbfff193d8ba933f89b11dc9647da8aca9f326. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DETJ51700128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dcdead08aadd2b398112fb7a7381641ffff207bc0a0b2118ae42f5a5670a04. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/DETJ51700129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ed407093aa42a8744b8e6b8a8bc9cc355bdadc4a88d766b407dd154eb55da4. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DETJ51700130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebe6071d41e8d57afc45e6b8c8aca68fad330525d7b2efd07a4cb645d72469b. 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/DETJ51700131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe883c167b10cf978ea4657cd117727efae5185059aef9cf5feba1cda4b918d47. 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/DETJ51700132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2658aea19d99e2739b85522cdde7efdda7f1514000546f8dae59b7db4efd57. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DETJ51700134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed67da4d5ce2198d5196250a337489adf9bdb2e3f19315d0500d7a2318686f97. 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/USI4R0910678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3636e43896e53bf0042bc6fc7f34e59566ae524046dc3caeacf9739ec7b7586. 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/USI4R0910682.