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 0xeb7c0ff7e66d0e74f1e006fad962ae7ece8e6485d9b97c9f94b56951f97abac7. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/292a5aa5-5f93-4bbd-8c16-ae480ba12efc.json and https://artists.proofprofile.net/proofs/artist/292a5aa5-5f93-4bbd-8c16-ae480ba12efc.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 0x9ebdd2fe5c2fb5d72fcece41203ebcac98898eb057e01b502528e84cf3ce0a66. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR9W12215739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82febf50ec20f35544ca514779acb7096f3eebb49fff31b8f671d120e67a0826. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12215746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648cfa37c7bccd23a2cb1c8f8010fd0c9a571d6a388b68f06b3a26604cc750e8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR9W12215767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1f3360652ed217329b7da15645ae8423aaa5633e16b162f32b59f39d3b7aa0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12215765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1189c28ce6397dee8f4e8d92def4ffc3079c08c03ba50a416a5bf60264d8e4a5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12215740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae33d77376fa91d9b8fd380e9cf7736abbf809ef01bf84ebbc98c463d5eb988. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12215741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bd4a6236e0722cdcf4f8f02b0fbb78f9c0e8713fe2e73fdd7a7b787bda49b6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12215742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd29cc8e22e4dec12ddfdd805380abff6866b2db8b95567bc8a960491e2bddaf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR9W12215748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7957e718de87802cc5e54f129d84fbbf46339ddb1e7396ce00e4685f1f76766a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:21:52Z), 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/FR9W12215743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a5741fc419174dd2bf528fb8056b5fd5fb58a050b121250300e64a20ee9ed4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12216095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3f462168d18de345cdc830dd2e36ee51105b61c52c51618008b917ec42d25a. 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/FRR642200440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c68b0c1b616d23a7e3e12f70ed19a270c9a7822d71ea8273c8563d5279f4f64. 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/FRR642200441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7022ed25245c013746fc89f10a83de965571af97d4a9d7089b875ca1117496. 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/FRR642200442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb484da72acbc96ce410344bb2457600cd0fc5f42f33c977c1f36dc08182f0f. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:35:45Z), 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/FRR642200443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2379427f8c4a53de04949a8ff59e1cd0cb17c3cfb56d69d1bdf3ec49b3392b. 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/FRR642200444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c2a0edabfcff00727b493d58c11af0aa14d0fa1c7e75470c7d7204814fe9c9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:44:03Z), 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/FRR642200445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdca96f11c227399c001684411c1e094ad4b39c4d2435ada218834b4285d171f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRR642200446.
a snowflake never falls in the wrong place
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcbc884524db8b62fc12c0f1233703378ce0d4095d93e0e3424fb0b7336c94f. 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/FR9NG2100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f31f529da8edb5627ac3563ee3e71e9037bd6e9997ec706b09cf47f6c5f4681. 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/FR9NG2100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b48785f46de6f3caebc333f73dda7d06683d0620747e8bc2eda1afd660af9d. 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/QZTAS2214693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a05803e8ba893e1207cc3d750661e903099f65fbdddf7f0229b2562b01eac54. 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/QZTAS2214698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a639ffbd463d7c5298e0cab5869cf3d9b709154f82782dc625edfe79540bf2. 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/QZRP52133451.