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 0x3168e558ce7cc15f06d7c6a0aac6635e7681f1d1147d69f0f82c8644f44d249b. 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/97a57f1b-fc07-458f-9d11-c6235144f424.json and https://artists.proofprofile.net/proofs/artist/97a57f1b-fc07-458f-9d11-c6235144f424.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 0xb87662815949633d3bb363500781ee0fb67adc230c9a3d282ea05ab38eed5029. 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/QM4TX2285560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6136f865c31fb518aec5de7036c77f5076006224f13922e3363e4a34ecec66. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TX2237020.
Won't Let The Sun Go Down On Me - Radio edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85dfa55d1e11dd426ffb32b0554357f554a7854e76fe79b510bf684f9818379. 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/SEYOK2129879.
Won't Let The Sun Go Down On Me - Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d71d1974e38baf04af1dd3ab2591b4a4d8b92455c4cb51f637a2cd8746ced5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEYOK2129880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1ef04615d3a6cbe327976323171575568018c89367f9e3aca137cf16312fda. 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/SEYOK2103785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e9595cf8ef81b03d642fa0a5b1045d5b36b1282c9a9b070250d3437fb4cbf8. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/SEYOK2103786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ed436e40dca163e4c13a022435ca9a4896e17bb75be554b54c113962b91f5e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEYOK2028031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9040768aa5f892f25b22fee414de08d9c2267bd50cf885a0befe220d77242401. 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/SEYOK2028032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d622613dd3105644882246ae5aec0240583fd47c27fe16bcdc45dc8dc45e77. 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/SE5XG2421846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff5965c20f764fe23cbaa49f4319c0d614837031fedbbf77ee92d10e41ca019. 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/SE5XG2415843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aff6485d4086730f944378ef6c7d6a367f1015da56153e9587848bafe82ddf9. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SE5XG2415844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdda7f5cbf1f140ea44bd007980b693bc33c7d95820faa27c870f5344e3e2ea. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/SEYOK2338112.
( I Just) Died In Your Arms - Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014be62627f6f74f26da50df3ae763560b8667ae8d546d319a7d96dc213b4317. 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/SEYOK2321316.
( I Just) Died In Your Arms - Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74866aa0f677deb697bb94122f6dbdeab2d765ba495db1ffedfd32da43c2f03. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/SEYOK2321317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d411ea91fd888be2eb331c7387f558e7f22c7897e50f55a0be0e77a26a84ff. 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/SEYOK2311912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b00ac4491037788f781e3f201a7272533e71c70e68206d323f6927454d7aa5. 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/SEYOK2311913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde78551779162e73c8220a29d45180c91ac3b6947dff43d265d4528d4d1decc6. 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/SEYOK2239146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ae68eb32fdcca842c8cfdf5ecad045978f4fe285a0584e999bfa64b7fcad4a. 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/SEYOK2239147.