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 0x8c37cc05511f922455ed5a190a5b42560138a973aff840264d6fcadf25428741. 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/c1b17b70-1f9b-437d-bfc3-352f79849919.json and https://artists.proofprofile.net/proofs/artist/c1b17b70-1f9b-437d-bfc3-352f79849919.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 0x16053d918f0f41127f88509c96fe0f4e56efc25679dd62630ed09993b2d4d847. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/SE6SA2155786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf74d9fc778fb762a959882c871c6f25fb91be591bb5dc5e4c5921a3e6d608d5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE6SA2155788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f7036c85fdd6118991416b320ee36dfb30482c6d94492e3d3e295e0f47ee5a. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/SE6SA2155792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa06663048023cb48ad978f4accbc33373018ad7434a09b2e7898e4e49370a6. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/SE6XY2163922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe285066ac94a13e509f53576611847be8a6c7ddb212632edb082fe907423b2e4. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/SE6XY2163924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39726036d5e7f615a2199502085f9653029c976a9cf4b9c48eb635c329ecdce. 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/SE5BU2311935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c7c6417f6b18cf41ae340d2226c0b8e4a8b732b494ec82c729dc249eaa97b9. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/SE6HN2330187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a67f37ecbd5e84789ed1411d701f9c24608062fc396214f1400ef39e4da69b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6QE2339254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c5e1cf5f05794986b9820f9782bc642d3318e3dd44cfcd5eca9a505303a3ae. 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/SE6SA2371405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607f218d3131a9e0534d471037ee16523d83c195e7adcd8cfc76681f65e3ad9d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE6XW2354529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16a79908d3414718eff2150a16cb5da7990db4c237470433a7b4af6745a2db2. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/SE6TI2316256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c861d758700eb8839cd019929829829a5c3b734e1f8095433bee025f3a6909. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/SE6SA2346833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc9ca21c37f542420165341dd8ad482d4ecf858f0749910fb685e3850ac813b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/SE5BU2418420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ce5a616057be9420bb55e08fb5062ff3df6b986ad030ecf06132f09bfccc3f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE5BU2418422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a792b5339258edf46faa29a5ad7d3f7859dd5c3783c6ef8343253d7a9aa7f9. 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/SE6HN2410500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fca6faf5365c7edf2dd434b9d2a8308981f7634611aa7fe36af16369b2b6bc. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZNWU2407764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf2c513e46b205044db67e8ad1e01c51957dab45f7ee9ecd6d0031b60a23d33. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZTB62486581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877e88c5aa91c0db8d3f99a5513d443ad4c27233c473742d5db5a1211836870f. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZWFW2454874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6d050bd9786b58c4edcec1b8431e6d3d867fe6166056c02c970999bad0639b. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZWFV2457029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343e8f52c47295d9b7bccbc57d614d45c7230e234cfeafe9d376ff098488670f. 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/QZWFV2457030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49be356cac5a6b1297bbb4128d2d490c998050e09fdf5bdb0f8bc9a6860c298. 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/SE5BU2549984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d4440ccf3c21a02ae054ae05dacf9b50f7a536510f02aef1d1361f550e5a69. 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/QZHN52536301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a42892e4296c554d6963538aa26668a199d18dc66d225e70cb7a3043998228. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTAZ2501574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7988cdf70257f735fac6336546e8b372aa9c21e5214c4482bc17bc4ca3f662b0. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTAZ2501575.