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 0xe6d905b4df4fa77a407bf816caef118bcbe51a062844720303f0094c850a06ba. 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/d9e59a9b-adbb-498c-b3cb-fb9def2edf77.json and https://artists.proofprofile.net/proofs/artist/d9e59a9b-adbb-498c-b3cb-fb9def2edf77.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 0x8f671f8e8b3f5c07c31504b883219c557ff7797b9141ae2a6dc9cb5d50b987fe. 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/DEPI82321197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2636e3bae1d26d5a95ed105790b33d5d3dd9f67eb35ed9420d72ba34bb3bd1a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEPI82320555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce89b60fdc7eaccbc1932c4d831c853f5a0f1eaeef80564150699418891bda8. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GX8LD2345878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d523dd080125d0d71622ce0382dfa2975226a01919f159a2cdda14b10073c1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GXBDS2361186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb4e180accb209bbaeb7e94cba5f201e4a091637fdb54d6f015349e4824416a. 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/GBLV62308838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e48773f30305b414b2b2c7af62422ba73f3e58bb26eb839c0a58021673d575. 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/DEPI82320395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8278af18fe7230adb5fe4847cc0e757d758f5840de716e907d68dd4abe3913ad. 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/DGA0M2364033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5ff315ed37241c46740f84a227f926d4be51be86442e2f80e3a08c20d846fd. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEPI82320351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe484486e2d28f3fcf4ab0913014440fb33f72ecf62afd5bd2e5459e4c03af0f2. 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/GX5MX2390452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f7e0c32c98c11573208687e1b86b815054a3d53debb2c9f2ea471e6759653f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBKQU2364710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2092df54bd0b6ff6d3ebec232ad5c21211120291e160e9147b95b2bc24bc5a. 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/GX3HH2352539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469dff8a9cc7f38b3486ed90117ca4f682344206a9e1f89e21842c4fbd311cfd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEPI82313464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83a4134487b71937f85f8dd89ea901f8ba063c422670ab5636cc9be75c960e9. 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/DEPI82311478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d98d7316861f1e0b7f03c920e9257d7fe84a60f131c456741ac37ecf947dcbc. 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/DEPI82311475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5158f1a2764e50745655c14f2a7476906a84665856c8822056641640d9bd3812. 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/QM6P42306077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1a3f0acbca7d221e115f387a91783695e2a71d0b67368276e513e4879a4e96. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/ATEK02355009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8379a7aa8e838e7d9995332205aa53e8e2f10e8980af138592f32c52dd191d. 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/GX8LD2251118.