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 0x3ee5e6a8d85ff70ac6cf82bf213ec16e53d64c81160fa6c11da0711b81133a48. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50f37d9f-9f2d-499b-97b8-83ee62f32f9e.json and https://artists.proofprofile.net/proofs/artist/50f37d9f-9f2d-499b-97b8-83ee62f32f9e.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 0x75e281509fadc5b78bf95222c579d53e0c6f4944e32de68bd3e9598c439b63e7. 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/FR10S1455780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b82b020a1cd03c48a826200417027b177a7f5fe6d29ed23d2a068f48ef74dfc. 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/FR10S1455785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aba3aeda388be5bd535bfea33819203d1d0351dcecfcaf4f32c3c362ce662ee. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FR96X2058609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47b0e4c2dbfd1fa60efe8d13d3571a3a1cf2cece83b2c054f64da74c00f13b9. 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/FRX871573636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4e97291bba3ae90b7515d89d257a0d1e9d726893198bd9aad8fea277846443. 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/FRX871573638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b42c396513a617dc6a3a70ece724b370baa1cad08257e606f3baac9b7c43ed. 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/FRX871573639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43770bb07e288f496437a7d63d066e2457c711a9d86bde95739d9e6bf566b091. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FRX871573641.
Sea of Tranquility (Bali Meets Japan & China)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae790b4f079024ba362597e6fbd6b8244ddb5993014703a154ae4cee22ef91c3. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FR6V82273327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb21291564ec94546363c7e7ff648ecc91b0a28e3707157eca585a78d810c70. 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/FR6V82273328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2bcffd8212e99610a7cb42e8644e5fc499054afcd1665962367bf69e8a3e86. 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/FR6V82273329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2314a5f0bf1914620c462bd61fa123a0e7eaaaba2102f70d5d0e299a281ba0a. 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/FR6V82273330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7a30861dea1ec885f36ac7e4bd3cb4b13ed93917a3ad6477f1ab2c5508f290. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR6V82273331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984e62c974755efb1e6656eecb5ce97316de190a3f5b7ae3dd156c7f6601f462. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR6V82273332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea85f3fe049c32111851f2782e6a8df5c1e0ee165482fb20f21774e2e9e7ac58. 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/FR6V82273375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032ad0872a3fdc576a36aa04183b2e10ef3540cffb34e190e4f8da7839dceb81. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR6V82273377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685c2c3ba8bd9ebc38daa93f802daf7d75e0f6e09ddc9c5783434f449de10128. 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/FR6V82273378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f777d0321ee02b736e2283cf26d0c2f5417a2ab7457a106cbd3d839d2f5fa38. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR6V82273381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53720b2b9ff9d24a3c3f8c41367de4d9e9b1d2a4649a9939bde48aaf977914c1. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR6V82273385.