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 0x2a099c2d52f91c20e79af5b9b5e4f6b2626d1a900ce25a0e44c5bbab05c65b1a. 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/1f4226f4-4de8-44a7-bc8d-59dadec16fbd.json and https://artists.proofprofile.net/proofs/artist/1f4226f4-4de8-44a7-bc8d-59dadec16fbd.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 0x97cd4c262f3626f5a9c469ba604dd48fa81f368639ea944d4e2cc6c9827b3b8a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEPQA9401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfb1154b542f40e27f9bc9cc5e9f09f6b35d22fa3f85797cb59139a3ab96fbe. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SEPQA9606010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa920c020cee99da431162edb905ffd11b20f94c9f961de6cc9f6a92a1ca8b237. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/SEPQA9811010.
Jag ger dig min morgon (I Give You The Morning)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e15aa77b11ff2252f00039709a0c3cb07111a53ea8cf4eb98f2100584f8eeb. 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/SEWLJ0500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce865e583e4e224acba0e3ba331f4c24750fd32471104dbf41458cb06a48ede9. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/SEWLJ0700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6fdeffda08954f59218e7966cf5ef05dd046a3b48624e3c991331553a9ecca. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/SEWLJ0900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a278f97ff930acb4def765c4031e40e1259453c17ac4682866fb46d3ebfb45. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SEWLJ0900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825f725a751014dc1b014fb8f9e384d8d6f0350027de85597f1c75bc7045be62. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/SEWLJ1100103.
Balladen Om Eken - En Afton I Ruben Nilsons Anda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efea6ebcfd159b75a6e178d900625d47936905af65517c4e257d581c0511614. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/SEVCE1300124.
Balladen om Eken - en afton i Ruben Nilsons anda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7827a5b66198a2cca1aa9c86fca49687a4c039a4d87fa264d8cba9fed34258e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SEXCH1450403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ecbd6b751efe681f441d9b7702314e2dcd55f8ad301cc7ddb144d15b025ca9. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/SEXCH1450406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291700af3123fbe0cb9e1d77d378854aaf7bb11c975f1f51dcfbbfb48b9d583d. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/SEXCH1450307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd6cb843fa31d30b4905b539960344a190f59ee7c52f497eddcf1a2c0e31458. 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/SEXCH1450409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780886e27b89b74414664d3e5de027e3809a3d9795ad9cb874608d82477379c4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEXCH1901801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4cdf0bb2794bd54effa37e621d26557f0fe2dadf0dcc6f66c5d1c09c1fee2d. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/SEXCH1902005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63456e09e23f0578385d36aee736d7aa221b7bdb6dcae5153e3e0a94e6691617. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/SEXCH1902009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88ee85b1f5eb5a530fd80c5ecf1b0e06a9af4c1a03383706c771b1d296ddef6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SEXCH2001401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0789f938dbdee1d94ecf916ec41e713e12402bf0d56ede7669b0ba50463f8ce0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SEYEP0800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cd4c262f3626f5a9c469ba604dd48fa81f368639ea944d4e2cc6c9827b3b8a. 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/SEPQA9401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4982c5fffa7329f532473355dcc5fe28fd9e9bb97ee8b6ab1bed081f7ef66698. 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/SEPQA1300344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0314e94532becf658659c5d03a5123355911b1a53744c91c046b7b77fd629bd. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/NOX9X3503915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf65df2ca7c48aca0ace5c39ef04e04c1b5fd9b3225b423ffeb9d17cb29e477. 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/NOHEK0507130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2312eab9df79f4555bcf7e8595a8f06188784fef036d11028fa5578731d47e1c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/NOHEK0201050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec0365de6a61949a291ef25b71dfc725b53531f9b0e4585039c9e0af401eb53. 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/NOHEK0201150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10be9aebfd29c9a7c0a5baf9678d5c4f388934b14ef44c740b9d68cb50cee0e4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NOHEK0001020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cd4c262f3626f5a9c469ba604dd48fa81f368639ea944d4e2cc6c9827b3b8a. 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/SEPQA9401010.