thumb|upright|A sign encouraging carpooling during the gas shortage resulting from the 1973 oil crisis Carpooling is the sharing of car journeys so that more than one person travels in a car, and pre
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 0xc7ba19ad2f45b9ba42532df1a4c781753ec075b8e14673cae9809dde5971401e. 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/411b75b4-c541-44d5-b6e1-35a4dc90b7cf.json and https://artists.proofprofile.net/proofs/artist/411b75b4-c541-44d5-b6e1-35a4dc90b7cf.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 0x6ce7425b172594f60759566b4f8632bbb8bec110da15c39dd303700e609e4fd4. 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/QM2PV1833356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd130e99f41c98fa0d3ce2c232bc2abd62e7ece3adcfc469a346a1e0a0d4d4587. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM2PV1833359.
The Salty Song (Erotic Nightmare Summer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7633f10650ae91eb2f2ec9583c0a3396b0b1f4ec6cfb1f81f65830f37f55b74a. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:22:40Z), 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/QZHN32036987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c4e42bb7b356518e0f8cbcf86f49534f496789fc3a3a8710735e86b5d57b76. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZHN32036989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734014c9adb2332d2ccde21b85cf9ea0ca5931d1be2ccc0740716d031c028602. 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/QZHN32036990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa420e58f8bfc41d58672f94bd62936425e080205f37abe59cb189002ab936d. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:31:33Z), 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/QZES92013022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b505cf7cc0243eca406817dc8b2c689e9d2a59ca93f7029ec6d67afcb0b34e6. 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/QZHN32036991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4eaac447e5d3014bc3d62f19ed55d6567f754e503694446886e1ac781f459da. 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/QZHN32036992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0330f7cd2f175a433a07be49a2ceb35e1f8f184d70e81d02f67d3b82ae2b46. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN32036993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e4de59a19adae81337c888d767eab92e69376b07b708ad5c78a384a29f0bb6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWZ2004743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48e346ace2cb3438bde4d937909313f7f3df3b3202da1e50aa24e8692bdd737. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZNWP2250142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a15c7c142420b110c125cbf529355f92ba67f23251ab10699a4076b8789d69. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZNWP2250143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa0fbfbff732e5928f3b595c4e6e25a479ae7831febee3f233c46275debdff4. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:05:42Z), 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/QZNWP2250145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a61548b53fd2c9f807da248621c3e1713d01614df2c434a8f9a8b6b18f64ae. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/USA6G2380902.
Open Container Blues (feat. Briana Wright of Cliffdiver)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a30c7f52fb8c0045daf5dd9ac40dea3ae0091945c41270eafee8b9866c31d1. 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/USA6G2380908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560cad224beaccbdfb1c3363d2534386699f77c6394a3ec75bf73cf8b48d71fd. 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/USA6G2380901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031e19ef4776c9e0688aa1eef6dd18f7b3527b5d95d61062da242bbb8b1e21d4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USA6G2380904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8092525a4c4adcdaac548d19f16cba106c63b98de0085771d0264d59293ec9c3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA6G2380905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb486426545947dcd9196501727938270d416cc15a1543d9994ed8a46f3ef0e7e. 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/USA6G2380906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9e3b02edf3718f2df4c147a4e9af3fad8f9575afa12d318f694ec864ed0f58. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USA6G2380910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52a0de6d46da0e7466313c97fb7442dce97394674075f9e9f3997ed510851b6. 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/USA6G2380911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a4e99acfcef824fe4b30f480299aea6f9e1a8226533dd95c1752efb000776a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USA6G2380912.