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 0x1c1092f225569a1b14232e784cf051938e5e0edee42ba015d57bd300309e79db. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51981024-92ff-40fe-9e6b-6fac0b42c0a2.json and https://artists.proofprofile.net/proofs/artist/51981024-92ff-40fe-9e6b-6fac0b42c0a2.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 0xec31c9712845f66e711c8e35130ac2a5ad1ee27d3cbf032e6d12a50e0c7caf8e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE6I32149803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590dc79719d0828b9494c9868afd67dc3712be22a2c4056465e3f4801155e932. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SE6I32149805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6360f98fab663825a5df7669f30e451829b20df1aab40c97dc08a439dccc2cc4. 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/SE6I32149807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd010ce9c6342de299af88d59afb5725712b4f7a172a413a151b51f4b77f03f9f. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/SE6I32149813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84bd7f324bde31a03be6d683255911ecbd8901e9443d283cb61bfa7e1af55a9. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/SE6I32149814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38ed167d3637779cdf10d7a1cdc8119c05aea98613240fdc5c8a13ac29bf857. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/SE6I32149815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0879fe6fd714f63906150c96ba9111603da004430070044d6560facf13beff4f. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/SE6I32149816.
När du går över floden / Någonstans bland alla skuggorna / Det är ingen hemlighet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa694a15a15f8205e3dfcd78526b05c2cc34c0c7b4558e4fd17cbd30c460b018d. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/SE6XW2140888.
När min resa är slut / Ovan där / Till himmelen jag går
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377415bb7daa4fc60613fc340f8ba268c76985e7c783b9c40ec02f0a24a9751d. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/SE6XW2140892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e5f134abf99655979463060d5085bd32959c71b83a5576bffd113304811d3d. 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/SE6XW2140893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d12a48af139af1b7caaf3948fdf4f3c9eae3cc0d46eb487c23f260dae85d577. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/SE6QE2490613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c182d266beddf5e911f16f3e5a73ecad90df1a269885c2adcf54223c36ff1f. 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/SE6XY2520456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85213b61237e8fdc705388f4aa45bff051d3961985157748f2f49ffc82b9bc3e. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/SE6XY2520457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b0c46e5ce9cd5611e79c1361f68922605ad7e370b78170f7d8f4243229d676. 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/SE6XY2520458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ff5e86d7b70220f0c05ca15dad4b48098ea82a0e0fa89d1f41da719cf37280. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/SE6XY2520459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38ed167d3637779cdf10d7a1cdc8119c05aea98613240fdc5c8a13ac29bf857. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/SE6I32149815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41d4efe1f87a789430e271dd272fc707e4b460e13fb5d89bfca8cc9c92fd320. 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/SE6XY2520462.