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 0x9d24a556aa4e806da515a8a672178b287c75bf55dfe2114674a00a7ad4a31dc5. 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/7fe55aa2-3df9-4f00-a380-c2d3c15e2242.json and https://artists.proofprofile.net/proofs/artist/7fe55aa2-3df9-4f00-a380-c2d3c15e2242.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 0x80f07c5ed5558061158b27f24c59588494cc2dfde4fac266ffaa1428648dc5c6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLRD52339151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09111d9a91ab5dcdaa4f7ad815de9d6a65bca481020c9d31a8f922575130461d. 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/NLRD52339216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4613ce5b52820ececc284d4bf054fcb23c5b521a6d2521091c4ac256a1b1da. 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/NLRD52339217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4cb3a137bc3493ad9ee69f1be1ea39835af5e6db827ec2b9bfdc2758e522e6. 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/QMUY42100117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428ffef0e60dedb7892bd8015de0d60897480683988fc51ff18f39a4e3539fce. 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/QMUY42100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0ff0b0520de0ee07321de4bfb2d0f54bf531fe4756819ce91f5d1a8830f919. 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/QMUY42100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c736050718b25d6597969baf53154e894d72660697995956f1d24d45e05c94. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QMUY42100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfd1ff1d23388f0b774c3eeda16479ce07e2d577e6d0d98ea7c6acb6ebe4457. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:21:41Z), 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/QMUY42100122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b3fd5ce26b4ace556329b6be013387f75a2f816683de6066f8526a384995b4. 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/QMUY42100123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824428b537d155c082f54b0df76acb83ee6c1fb89eced97b2bbcfa5bdb5a16d6. 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/QMUY42100126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc71acd98abfdc83c1ff86976d2a8576cd8a9054aa50aa7a0ca3c90ad7201218. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:11:58Z), 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/QMUY42100128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d75c162eaeec2038b60fb77ccb863e79985b73d7fad6cf7b531a43f0991c051. 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/QMUY42100129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d292ea524b3abd496dc522db53549ae734bd6092e20232b89c1334d0e9b63d. 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/QMUY42100130.
Damaged Hearts (The Brothers Macklovitch Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e54511adc98f893dbbaa9f18778f2d37a6ca68c4e1474422524dc59ec1ee6ba. 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/QMUY42100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c99562175ed683977fabe5013677c461ce528a7966c12e56f15f7779d4ff7b. 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/CA5KR2130387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e406849627af87b96b19a0c1ade0d60f65ea4acc1dfa2a9a8c5ba451f05c0a. 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/NLRD52203698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f07c5ed5558061158b27f24c59588494cc2dfde4fac266ffaa1428648dc5c6. 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/NLRD52339151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09111d9a91ab5dcdaa4f7ad815de9d6a65bca481020c9d31a8f922575130461d. 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/NLRD52339216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4613ce5b52820ececc284d4bf054fcb23c5b521a6d2521091c4ac256a1b1da. 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/NLRD52339217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab4f03645809a70a284a8e3de2941c0bfcab705f9c317773e3e1067ed134a90. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NLRD52339249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acbc13bcc5a4ec928792c3c1b8732656dd4268f92d2209f1ee8f63a182ec658. 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/NLRD52339250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb585f9a9b6bc2a7ef467a950b1d7c620c8b90e3a529dcd4f418b6e48421bfcf. 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/NLRD52339251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddcbdbb1104cd63ab4382499c970be9f7d6169e7ce92a2cb4ccc64874931108. 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/NLRD52339252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aff9ed715b04c77c2ce84447325b23547a5b7e9df830f1b833ef95cb13381b6. 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/GBLV62402565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fa33c7b101894d372ff6891db6bc39be84af568998ffcaf1b7a758ef54c667. 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/USLQ22180769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de9b593c82995d4c0166444a9e178c8b898ea9e5ec754148e6b0bc6e3cce7e4. 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/USLD91729311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab4d54937ee83c3201b6ce8e5a41a991004c729445c16512a23a48931f9e42d. 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/USLD91729312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4e174f4db4fb499e311d1a16989ebf6cc9f4ff75b68ecae30b1c672e442668. 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/USLD91728044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1b09d9b0858488189603eca424421bc080924c7a31a6c46bef9ea3cbd23058. 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/USLD91729316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3a9931ac676f8c4747fbeb49e57976449228474130ea5de0476784f25a6192. 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/USLD91729319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7fa277032af77ce44a6bc87696b7eddd2111e0e5e2e17903b72d249c90f7ed. 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/USLD91717678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9a7d41bf5b4804a8ed971da1116755a924e0e74dc23e226ee6b0fec88289b7. 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/USLD91717679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673b4e544d6076371eb9b02c756ef73fed14bbdb8807812376d29bf75121768a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USLD91717680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39bbb9693b5f3e5c2219674035a58144dba543574f707b2a8fa8e69be9794cd. 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/USLD91717682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db99694972ed1a6b14e5a2a8854a0a7adcb1107aad6c2ed1f625a37000b77c2. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USLD91723448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844b2249706e89416f56895af91c5a6f51bb5ea1e3f5eeaf374ec8153f33e3f7. 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/NLRD52203702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0af5923193339dbb32882ed59f8de8c98c7acd50da151b1063b2d07e53f4ae. 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/USDM32003401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c37f1747f815db718476c65ba1f98627a304de2d91d81192c7f3cb9ef091bd6. 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/USDM32004001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d3afde1d3d42b24b242ef251dc3926dcc88965fe22066d0b441cd08fa392ee. 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/USDM32004101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c844118b493fc3e5492cacf33c37c459bffb9583c7aac42c4df1f65a929d75. 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/NL3M12500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af68afc5e06986df05e9c60df6673f3fc09cb815f9e6ba60d21bb8cb03b8a73. 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/NL3M12500111.