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 0xf3285511fddbb60f9a4a5122aef282f63a0b7cadb16f69a40b99fa6e2fdfd929. 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/772846ba-69e6-4404-8c4d-8d72eed3d46b.json and https://artists.proofprofile.net/proofs/artist/772846ba-69e6-4404-8c4d-8d72eed3d46b.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 0xdfc45e7b153183a0930352c1d15d74531e2519283cdd0c09f245382a1c2ae58d. 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/VNA0F1768991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d48d53752535877e446603c5007ac3eb898efef0549a71d5a2e2d973e6ef3f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/VNA0F1768994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38b3e29a1512bdd77abc88853ccdf1ad6703bc9ed8ba09537288bbad4dd5201. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-15T21:33:28Z), 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/VNA0F1769000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca7fe61409a7040ad86329f65d27b7e2c63bb265ca8ee8067b59665ebee1ee4. 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/VNA0F1769003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965ce1d43772d522b6a3dc56c58e3658e260445353f63cdf517485bdc468f9b9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/VNA0M1904984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daf319acd0ab22de7e35e5cd9b8f81c403d7cc71a8684c75c3a05619510f55c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/VNA0M1905013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdad6ff5455a21fa90fd62a289581108fc7c340c72d65ae5a3542bec8b512b93. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/VNA0M1905025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b59bc910b30de51c93b88facc29294074ada40bec161a0d293b45b062050fe9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/VNA0M1905049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a53139e90ea661217cea5005962ba78cdc499f6bd8b518d24b5bced92bd6838. 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/VNA0M1905056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c3781f9cf1bad930bef02b74c603614bbeac046a9b90b41c980125f205051d. 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/VNA0M1905083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ed055f043cef3d33cd19ab3c98b75c1af0a693a78c81c797a050a3721e525e. 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/VNA0F2001231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c3e4bafbe5386e46d30e265c8d3b657542567ea90ad1d8f999b26fbc1913f2. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/VNA0F2001235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc8b6cd446fccaed75f1ab3fcf5e6f0b78c5a44052b8fa7373b648d171907ec. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/VNA0F2007735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65a4fde3b5db433571be0a07a383ec2ca2a5135c0932faab4288001f6a150d2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/VNA0F2007738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3898d16a6edfe7a143fe685a64e6af4ddd7978a43004a8c6895ebe3a71180d. 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/VNA0F2007742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103c344298444a9828f3809804640df7e3f0b37ebfd8fb8578829b791c72ab3c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/VNA0F2007743.
Nhạc Tình Muôn Thuở (Ai Cho Tôi Tình Yêu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf678be237312416180f005c7a5772098db5a9d4a9ba5214668ca5efdde11b632. 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/VNA0F2012240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb069a8f900ca9bb2b8d482fdde05e3768a6eec00c854d9a071cf463ff1ef0e68. 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/VNA0F2012212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bebbe840b4e6e70cff260dbef315d0cea9a2bc608d80c926c9799b6533d6520. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/VNA0F2012215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188c937df99502c48b1345b962feec79e1c491b73e0a9e75b938211405420a5b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/VNA0F2012220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66762a1334c510ade217d0d6000470a78c97a0366555ef09ec8d267866c2a2cc. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/VNA0F2012222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0e7ef9ec8c609eaeb8573d1f5e4b81f61a638eee850293bf0b5b5fd9bbe47a. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/VNA0F2012227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aab3e20b4db67592466a42477c68c173c12d7c99bdd53fd6e4075894b93637f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/VNA0F2117886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ab91a786eeba6001f147b2d9c59ea470552d62d1ae9dda1b97b212174501b0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/VNA0F2127861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb01fce6a236f1aadb5434f865c7676eaa5d9665f2fdce0bb6d55bc66e7087f. 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/VNA0F1782399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f4e304040bb7b6ca581363912fffb5d792f71363a23172bf653c62a4c64d52. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/VNA0F1782400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1041581fd7fd1511264405a8ab76455968bd6604d731e7dd8798a48439fe606d. 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/VNA0F1782402.