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 0xe7534155dfbafdb9d5d62cfefecb6aeb5da7937845d538da9f3740cc88b1e996. 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/4b637e76-1fd2-458e-bb51-d3359dad0507.json and https://artists.proofprofile.net/proofs/artist/4b637e76-1fd2-458e-bb51-d3359dad0507.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 0xba41ec4bb92fab5627cb3d20f65ffdb158fe817f89648f063e428e1a5abcd6b6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ISA110901601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89473f981db1f5bed0cbea29d7cf1e83d32e8ec0f358c77a7875384cf5e0f14a. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:37:36Z), 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/ISA110901602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027dc0f17be95c3ce4d27f11a46f9a8aa1c5cc17b12a8602071385bcc80ec440. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:52:19Z), 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/ISZ109401501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948eadf52a994d815cb657b44904db4c28b66da2e8dafc1d43f58ed3377fce33. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:54:28Z), 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/ISZ109401502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa494aae2420aa3e246ca9eced6f40c38dea839bb43ac9000719750cfd184a5fa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ISZ109401503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0ac590563544bacf6643e10a865656c85e323647599f3afeda5896c1c2bb2e. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/ISZ109401504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682a15991668d057e20e4fa210b2a4fc6e27e1baf988579a76ac8783d04a4c3f. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/ISZ109401517.
Icelandic folk musik (instrumental version of Íslandsklukkur)
Tyrkjaránið (instrumental version of Íslandsklukkur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f9c9ee2c4b794096511f4051a3ccf00502931639e5faae571babf3f2aca7fa. 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/ISZRU1008490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c77f84fdb2628b24ef07155ae504b72e4fce6d53863bf348f29d2de78b8b462. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:32:57Z), 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/ISY110500202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe655a137134dca908998894538ce301bc19507015623e60a053464d0c433b2a6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ISY110500215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa208b742ea770943a901c7bb38068a0affb0b65935d171bd7263bc184e27c7b8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ISV481800211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75356d77e451af8f1ceb745294217115aeb03f8efca0a49dc8395a7886f99ca0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ISV481800212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b3c6339e32182dba020bcf1315c128210342346849445f540a1b5fbf02736e. 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/ISV441628206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61ae48e1361e52479a070c8f1c97cacad1b957ced213d076e125249a60a1db5. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ISV481800201.
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 0x86448c2931c4f2017912e7273c8537144ab1dff117c605f5fc4010e63ebe7483. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ISV481800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c23709ab88a49e16936990dc3f134255c9b5322224c17b08467f43f13de0613. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/ISV481800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd477f88c8cc1791dd0a5b577c26e5a0d137b36f315d1eb6a479fde4b9795bc1. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/ISV481800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2c7a175f0bb17176a49a0823cc2a0062f1951e8a0bcac40235068ac0542b99. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ISV481800206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80bb2a588b3c17e339938c11aaaaa3bf8119b3f2556fb69388aafc7d82dbe9f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ISA110705508.