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 0x0a1112deeb1de7301d5eb152da64fd6a3e490f246b8ebd5636a9345dee3f194b. 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/4c536a04-dc60-4b39-9305-1c9dbae8fbcd.json and https://artists.proofprofile.net/proofs/artist/4c536a04-dc60-4b39-9305-1c9dbae8fbcd.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 0x2f53bab4aebfebc4bb0ed5012d9e7ec99e6743ac47ca6b8f49ca3a583518ea26. 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/TCAFC2082152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4764cb100fad2caef1f130c219284d07c805c45b5a96234ddb62b4b160ba7485. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T07:59:02Z), 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/TCAFC2082153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e00f9dc089d925f7502f4d0468b39d9b1d1cf550e3744ef12abf25b8f983680. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:07:37Z), 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/TCAFC2082163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9b99d2b7bda978632a183f75485b98221b395e3c9fac89ffe73fafe8948db6. 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/TCAFC2082165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fcb50c7b0d2aa2eb9ee8ca00c57d2ff357b5b52b66fc7bb8856dbb085a87c8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCAFC2082184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6204c2456691f28a4e4a0ec449c09226fb3c8d48941aed2736070e9b66df678. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAFG2029810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d62d8ffac3699e541b4f8e4c2e9c4a3eb1cfcad85e110753e7b7b3542619a6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAFG2029811.
Each Must Die Someday (A Cappella Vikings Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a929bbb7edade91424a2a4e3956ad44f8a2f5e6659071a2fa65f0f2ea5a595. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:23:27Z), 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/TCAFG2089948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875e78408f8a64b48b55479d6495aa601561abaa1540d47166e17871c1dd2898. 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/TCAFI2162152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ec58f7c241d52613601c81009fa1892db3ce527173d488613964a0bf21ddc1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAFK2162012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba2a3d7cb672eda742bbdca36f44972d41f01a744f2bfa3fc43e56dbcda7e32. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAFL2179602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf714b3e144e3e32d99325bf82c3ede531b441031b5584034efc296629ddd4b65. 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/TCAFP2194954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf264b8f2ffc76eb8eec4b2412cccbac4394912daa667cb29c8a1f39ae882096e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:50Z), 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/TCAFP2194967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1081695e16a61d5e2f7cd125980cb23d37199a123b8e651264dd4a953c692ad7. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/TCAFP2194973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520c0be4a320f2db79d4583cc35540c5531e9d9db4fefa6beb8bbbe9e640c72b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAFP2194984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08598298001276f6605491f1c3e8479cda22a47d7e6316c7de781684aedf79fa. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:11:55Z), 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/TCAFP2194986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89028d6940d8c2d6e17664a389cf3a2e06b02b8981cf84c8ac27db37a2962dad. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/TCAFG2029817.