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 0x2ae4024dd2ce431c4b25ffd044f11d98266913c5faf59dda54559e0f19b0c248. 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/2b56dfdb-65e3-4cc0-8bfe-b260bd5ad166.json and https://artists.proofprofile.net/proofs/artist/2b56dfdb-65e3-4cc0-8bfe-b260bd5ad166.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ich Zwingu Di Nit (I Can't Make You Love Me)
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 0x3f305683daf4059fcce10e4ddec2a1b4a5e7d58087267437d1aaaa4931383f4f. 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/CH2181200161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfda12d8f1a4d1c02cb3fa73846629612a751c540793ab2dc9c3ee3539304f8. 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/CH2181200155.
Sing meinen Song - Das Schweizer Tauschkonzert, Die schönsten Duette
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d6382494d10889028dfc7e41c8af784de18f011faa971a18f4e3d849630c1c. 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/CH0012200316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234837b513f02351b22dac04100b4109ced66066d3cad50b51d0194bc065346e. 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/CH0012200317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45ebf67d223e52d01447f14650d92b7c1771dca1b54f5c7d3dbae01e722d44a. 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/CH0012200318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf9876c966ea183398a0f1b5c499e730f1d4a88e6e65b3c3c2c96f86af68a73. 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/CH0012200319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfb32503ecdb31cf62572307489e429045311655f9ef0446fa260c5d14c816d. 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/CH0012100273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4825906dc4e9cbd9aeba74f7677627fb8c7a441bd10163b6e69b1b9214e4de9f. 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/DEA621301319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df99246e301760cae7c4d831a87ea63b90dfc33a28b696a88c3d6983fe50b18. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:57:20Z), 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/DEA621301321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231f6a6bf983df30d6aaad526ed36d3d69a5427ef3a3a12accda85b1e63b44c5. 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/DEA621301323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6711fd3cbdbab913547d1d8d57c2303833dd9949e90532af70a95dba9cbc33c0. 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/DEA621301019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c30a14ba94cc5b6c56e50ca8270268ad554bc886d834106238f334ba337280. 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/CH0010900065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f827db26320c40b5b6dd46776246960a36c18cde555138b3d4120f345d3a74b. 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/CH0010900068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234837b513f02351b22dac04100b4109ced66066d3cad50b51d0194bc065346e. 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/CH0012200317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82a7d61857c9aa6d4e20c2cdf633278ad45cd0906cef559c90c43859c8764b3. 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/CH0832001000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6711fd3cbdbab913547d1d8d57c2303833dd9949e90532af70a95dba9cbc33c0. 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/DEA621301019.
Sing meinen Song - Das Schweizer Tauschkonzert
My Man Is a Mean Man - aus "Sing meinen Song"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd0a7a27c2276845a5f39088cf3f142983dd086cff4a6764dfdd070566f8bbc. 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/CH0832000140.
Frömde Fötzu (Stranger in This World) - aus "Sing meinen Song"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa662d27b3616de035520360d5c7d1ecb7974dbae115b5a46a5ff94316acb7449. 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/CH0832000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4c1f1bfe00cf45c673016c884640d9e6a53fb5c7267e6fbd36fddf0dacdef6. 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/CH0832000190.
Just When I Needed You Most (Wo di am meischte ha brucht) - aus "Sing meinen Song"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf916cfd5a07ab5a2a2ac94b60e71e5bac9726ea020717ce7ed7887b7acfdee. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/CH0832000250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9eb17a5f75d05c7f0e12c48bae88efc40d14e9b7150758fe7628ef3463d6c06. 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/CH0832000260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392a07e6fd00698b90631d383e51a4fd9e7c8c72288651033e35d4ad2b2fe3cc. 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/CH0832000290.
Füür vo dr Sehnsucht - aus "Sing meinen Song"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e27572194da9f4f82d78149ed0bdd4d4d9c073447c6942268aeea0a6c16dfe. 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/CH0832000300.
Probier mi doch mal us - aus "Sing meinen Song"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903f6c72ea8b2713f9b0a35e07ccc8f30c1f8ce64805312875d6933abe1fe68b. 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/CH0832000310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b4b3e19691b5a8f1f722f06e407af5345034e1db5a1784d7d83533b5b55fc2. 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/CH0832000320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dc779b462e9b0d9d360f455cda20f8bf8c289ba43f3a3f816e693c9b3914d4. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:54:54Z), 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/CH0832000330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b0e9a3470f031f11f69e636d2cdb279a325618c35ea4eed86d467860fa9c9d. 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/CH0832000350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f23e0d6d6a35838da3af034bbff85dc1209c5e8f58e661d2c41720aaac047c. 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/CH0832000360.
You Can't Stop the Rainfall - aus "Sing meinen Song"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6c0af1bc62241100f8796ef36de2c9fd4cf6481245a6bec27c6ecc775df5ab. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CH0832000380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd37ac7631b66313f1ff40ba642b8efa05fe4dcaaa1eaf00350a7add96464f90. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:09:46Z), 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/CH0832000430.
Chrieg i dim Chopf - aus "Sing meinen Song"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522af3cd0074a32e032654ec44617df6f8fe229d5aeb1fc4f01757c6628d3bc9. 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/CH0832000460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a75ca83ef1056f62e08c67f2a3d7929059d349509522a439fdf48ac1e0f809. 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/CH9881800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706f7743d26a76edfc8eea030a1fae702c053bc1c34a74dad1eeccb057de1e67. 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/CH9881800061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29c6d5e1ed91c0c83ceb9276ae366ae733afc854f948f93d47b0e2a96efab5d. 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/CH9881800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22df2ba325f6c88e9b63ae710e3b11f2e0211795a0a7088b96184c6af31bc5ce. 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/CH2181800096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88de7bb648b8dd6663803eab3c1691e4ead9dde00434d40812d1dfde3df2eeba. 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/CH2181800095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a25cc6ff7298defa20d65b500abb3fa91d158cf967639b4fc4f499a65bd824. 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/CH2181800097.