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 0xac10014b75e5491c9e2b5d5b864dcece1dd765528f93dd115bb91068ee5190a0. 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/627b1a0a-aed0-4eb3-8d1b-cf4130da59da.json and https://artists.proofprofile.net/proofs/artist/627b1a0a-aed0-4eb3-8d1b-cf4130da59da.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 0xb71213de7a6010c5f264bec20deea12cf5e8e8b42b97a58ad1e648cdc927e67e. 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/KSA012291927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4903192ceb4fe9f275004fdc718e79f9570e85bd05986a67eb583133ff98d50f. 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/JPPO02302049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed0e8282dd7a8ff8c326823289aced6db1a44d4974ac72bcc0650cea6012ffa. 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/KRA382302156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067c14dc3c064d5a3889ff6e1e8750f7456b864e24a71e2f5b289efdbe095de3. 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/JPPO02300077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ef7c4603ea94ba6044c86f46334d9096c6a04e388d410b4f1c1dc081504e43. 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/JPPO02300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e3bf200a00481c09943418ff8981bbe724da60e9a361ff1fcdabdc01992f24. 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/KRA382208070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c18b5aa57695c6c3549a2655a98d5246987e341387c9bca5c3304a7e221762. 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/KRA382208071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ce630c2f38baa2fd68b00d42ca35adb93903f8d3c308527a7bfd074843a225. 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/KRA252201717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d168bd1e4896c5cd2cf0479c889a486d2242c83d040e1d9ea8492f4c720e89. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/KRA252201718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97769d74754b8cd54ec2f58ea768cb53716f84bcdbe13c0e54d91ab721ca3809. 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/KRF702200423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94c54a785e5bf1997a592808ed611941e239969737d35a8196a9164e04cbb8b. 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/KRF702200424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb451ccc5fe6bf9018e4c70b401c3fa7dc911343ef4220c133919cbbd6a82c25c. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/KRF702200425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeeae3c6e2ed084b05ec239cb8e10e962674f848433266321c61ca778cb090d8. 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/JPPO02202030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbea0736604cefdf01d4726dcf1faf6058d34e9dcb93ead64c9cc4bf375dd0fc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPPO02202031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbea0736604cefdf01d4726dcf1faf6058d34e9dcb93ead64c9cc4bf375dd0fc. 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/JPPO02202031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661fc6f032fa4083e73013cb3a45a29d3da951caba30211d82effea3b74aedea. 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/KSA012160172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2adc4af782d9f6800bcc5d40913c62b1d70f7aa3346f9598ab588242432247. 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/KSA012160173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662a2d139f8cae30e67032bd666a1a8e6ffaf681c69bce420b1328163a23482e. 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/KSA012160174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48576cc1c1e2b71375ef1868713731069ea556e49dcea72d0f181943da014b7d. 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/KSA012160175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55808f0d0caff5d0347238433ee06638f1a193379b280707119c06f2a1d3b8db. 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/KRA382204887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec477f314d1a06a7b2353e427acc72abfae0be0965fe6075b2cef25a2cfb814. 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/KRA382204888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3939bc32ccdb1428c71572b5bf89c7c6fbaf5dc8a281ab00fafbbdbf287440a8. 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/KRA382204889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cf3da69fa09b9286ac7250b43e3897f36294f0fbe119907a2f4a763254919a. 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/KRA382204890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c17929dc6afab38e88270546870cd158f62907983e1a375ab287da8f4ad3ba. 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/KRA382204891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ddf37c23f6e50ca688acc4c1c56ec109b3738645a34db6c890ead3307e0c6c. 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/KRUM72200378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b351ac390d2c19438534435e2193a2503ab99f5f6cfea3168f5b3f206f7ac9a. 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/KRNAR2204733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806b18057da9f0e7335ebccd1cacaa5534b07f735424bc55a32524e5086c6116. 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/KRUM72200408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e9db219228f95273d0652f03ced0775dd61dcb0d151905aa88ae5d86e992d1. 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/KRF482200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a19ddce1bece459854e2c0997862c00a04f4fb9b82b6cd368fc86bc5f447b77. 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/KRNAR2204237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e20ecc5514494271bdb95f6584c48d6c9b7df8e6bc32bce2ae7e3bf5a194176. 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/KRNAR2204583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeeae3c6e2ed084b05ec239cb8e10e962674f848433266321c61ca778cb090d8. 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/JPPO02202030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90c3688ba828d34465c4ae7df78c511632fe68cdd29844d236881190e0bb5b7. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/KRA381601810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31623619572c872513284d9c9389a6d5af05b95104bd45e456399e31f20846f. 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/KRMIM2222977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b351ac390d2c19438534435e2193a2503ab99f5f6cfea3168f5b3f206f7ac9a. 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/KRNAR2204733.
Into the Sky - From 'Trolley' Soundtrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd35e01a314e68838d3440a0b483cc37e89adbc0897c6afdad3d7dbf2ce8c992. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/KRNAR2234636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbea0736604cefdf01d4726dcf1faf6058d34e9dcb93ead64c9cc4bf375dd0fc. 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/JPPO02202031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512e090c8bf65ecd06053e15f915c65f1d7b9b6f1a41f88ceb5f17ca02cb58cf. 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/KRMIM2218651.