As of March 1 (O.S. February 17), when the Julian calendar acknowledged a leap day and the Gregorian calendar did not, the Julian calendar fell one day farther behind, bringing the difference to 13 da
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 0xa5d33aaff2df91ab62d6e5fa6b8c3c36eff7f1573bcb62f946c01aaca39dc766. 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/5806bc63-0076-4cb1-bc25-f74ced677f10.json and https://artists.proofprofile.net/proofs/artist/5806bc63-0076-4cb1-bc25-f74ced677f10.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 0x1000c90f26bb16bd5fd8c267f95ade5639746a1429d8181b3e1fcc622626741b. 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/SEYKB2400801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0d62c5a6ef7dfd7a5aac4820f6bb16f2f0bacac24dc16a706cb8bb9c2d7f87. 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/SEYKB2400802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a369d17cfdf1c97f57b074aa9eb1ee6af62441be6023e25231c93069f8c69a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYKB2400804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f44c3360a3353bbc05bf034d79bfdc8903b7404bcfa05e1247272a182ac3e3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYKB2400805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ba88226063c813228a403bf5618e1b7536d10935e2455f1c10cdd7231064a6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYKB2400806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38acd0905c61f49df4bc9600ecd6090df3c5bac08fdbb34324fa9b5544ac6fce. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYKB2400807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf590d291f0bc0d85d90aeb65c9e39693a32f93d5d4782d2e732b8635cde7ae82. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYKB2400808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9e41bc7e59fdbc9d3a0c907a4f4310799beaf547c9edb4d6b4669f5dc8ffad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYKB2400809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb24e83b508d8f164f55418d32c69f465043e6e5abd3b746b348419b024711c0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYKB2400810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9878f75d414e76e754ae2b36b086dccbe66598021204073a3020afce11398fee. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYKB2400812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e395a00a29b0a0a7663ba23175def81604946b72d888f7da0ea69f9fadd206. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYKB1800501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a33837bc6e94bb6f10172f20161a65eea9b174049ee3e8374e4ce456908361. 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/SEYKB1800503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31695b49a5608ea74daa3fd12bfa77a282bb0c63bc4e7810313e1afdcb669edb. 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/SEYKB1800507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9f83aaa4e746734b91eaeea7279579e490cd4b636d27a34ef200188a489b1b. 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/SEYKB1800509.
En gång ägde vi hela jorden - Fältinspelad
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227717cca9af7be6cf42cc474f9ab611619f083d83205badee8a3075e0031264. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:28:11Z), 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/SEYKB1800510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c0dc684b330e701646807eb496182bcccd77cd8ba1a9429980522eafde7191. 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/SEYKB1500401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374eae970e97fc1193170438151b01deb31c46cbe7a678311b87eb590dcc7991. 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/SEYKB1500402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d892d7acb86dee2acfa979cdbbdba06dcefadcd3f7fe75d77593fee5a66f3cf. 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/SEYKB1500403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4020caaca62889c759cbcf65144a5a74e149ab297b55c7c8cdd24dee6d580d92. 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/SEYKB1500404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8378f61a13240dda5b52883d2beb63e3b727b39783db62fc6f6828cdc14e2b. 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/SEYKB1500405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b77ff38ab0f78c82f2be15ee8be689ce450a3f4d48a93e7c139acd55119ebe2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYKB1500407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326d7b33c5f01a6c4bcc5bfe839d5eed14f7c64ef19dec6e69060c23e515bf45. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SEYKB1500408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8abf8434614f8ecf049df2fe0a9059dd70cf746e9cf2bca818108063d5af28a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYKB1500410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9c68b0b13d3164974d2b48bbd137b63577f0c9c2b6b8bc9f8f4e93ea4a8edf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYKB0800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f982d10962bc67215cc5503cc036171c02ac8d6cd5be337b223bdc22ecc8a3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYKB0800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215dd2076ea3abce5e4e36d0d3ad5adda7e72a8de758d4ec1f59b69238ab3c29. 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/SEYKB0800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27f8787e9815590d84e94ebeb990986c075eef9b2663418b47fb72bd8107322. 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/SEYKB0800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5739f1c1183c798266e83cd575d7ee04bf791c968e2ed7c4bef3fc560451e35. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYKB0800205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ffc5a90351badffd50fe17c94c44829b87a7621bd1163b41b6be3dcd317cc9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYKB0800206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394c4c502ca847fd7a15c9e0721bef3a01bb5a8b91760bed1a97d9bce7ac7ede. 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/SEYKB0800207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f32f7cfde74652ef8ad0453f752185e5211e3bf67bc78a386adf704cf59691b. 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/SEYKB0800208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe047255fb57f8aad78c5b42de6cda42fddfe2a736aaf03111c6961e131771e4. 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/SEYKB0800209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099e6da98a9ed84f285378495a9c0ebde259feab097507ce920a1554c3eb16fa. 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/QZHN62171477.