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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9ef1c002039650766b94bac02aeb6d294116aad6bb250a1cb90cffae4f807a. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d986a610-f01e-464b-8e9d-7ed43b156848.json and https://artists.proofprofile.net/proofs/artist/d986a610-f01e-464b-8e9d-7ed43b156848.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a929bb783880d67811d3d74accaf3ded0581e69eae0edfc4e743223f641ff94. 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/SEVMS0400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c939e9682b4ddacbbf8447d938c6664fb8e0d86572b8ff4131b0c26f76f5aef. 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/SEVMS0400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13e0ab91cf80166f611357cab3e029d9ee367e7513af19c2edfe36cdbfc4c69. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/SEVMS0500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2905ae9645d73d6a77cc1a30fc7675b9ba67fd277e22ba5f72bf2503a1c8dbc6. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GX3HH2153981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d29319e33372db5b511737ccc9792f05a28755a8cf8dd023c113555c75d0ac. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/GX8KD2285526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448c1014a0ae1c638cd9a6025400407a497f5fcf5fa8b9f780e8ecd13f49bedd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GX8KD2278166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a34088d6058136bd8118730dc262a65676e5235e51cec965da353414dc3fa6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:10:40Z), 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/GX8KD2280469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92aea168a99894dfe1d6d8f21b0547c9b7c67e05c9ea5e8c412a551725a38aa. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/GX8KD2283686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5965f9194339499b04822510de8f91b275a1cf6e2aec0fd04abf0760735342f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GX5MX2379288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf58212acd1250e78717b991227cc899cac1ecc399eb1eabd11c5b081c42d268. 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/GXBDS2481001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb58b8bb94c11fee5009acf3766796d0a190f28396bdc996b865f70a2f2aab8. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:36:24Z), 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/GXBDS2450586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c41b56a4b2416300194421b10982833e681636875c24e6c0a1db5154e831d8. 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/GXBDS2431603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1794ad59a12bff62a35d604c05ac6b16861679ae722ebe7389abc5c9bc4f86fb. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:05:32Z), 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/GXBDS2446959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f51fca2b4bbf44d4da73a8b1abe337746d765d765111c36d51f10c1a796592. 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/GXBDS2492405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fc1d7131d2a6d580e6f30a9fd253988f614b2757decdeb6f821cba6fb8123a. 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/GXBDS2439368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d4f401b92d441172f8828bbc55f640e9237c4a86dce72dc684b94868a2d82a. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:03:18Z), 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/GXBDS2479601.