Ebba Grön was a Swedish punk band formed in Stockholm, Sweden, in 1977. Ebba Grön consisted of Joakim Thåström (lead vocals, guitar), Gunnar Ljungstedt (drums) and Lennart Eriksson (bass guitar, backi
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 0xec923c564398193bc881d0df62132baae6fe5cc3234e6dcdcbd73780776087fc. 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/bb8bf62c-9614-4543-b2fe-a2852b498f15.json and https://artists.proofprofile.net/proofs/artist/bb8bf62c-9614-4543-b2fe-a2852b498f15.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 0x8a21148350b67e54ecfca13e110c2e32ff473664d7a41773ed677d1ca9687f7a. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/SELAA8001080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ad0ca8bca969a7571c36f97c3b0ed42a3bd7b40aa95f51381d52a0167624bb. 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/SELAA8001090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f347b7aecfad7e7b90a857007cc87a222d6d3a78e6f4aac542ac7483324d67. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:32:43Z), 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/SELAA8001120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e29fef69307cc94843a30787d15693f5809bc3c35e5c92c3adca9d79bac8f56. 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/SELAA8201080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e849cd756a3d74f152f62499ba4c022510a70869536932db4b9e8b7e7623d69. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:12:17Z), 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/SELAA8201090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5572d39159e2cd670dc61297ace2ceaa07bfb90445a10e503f9f5b3f0ccf13. 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/SELAA8001070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15694dbdae2a6cad23ee23accb4faecbab1d84131d7bcc7e865caf276ece08e1. 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/SELAA8001110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7898ee63bb6522b7fbaa2f45608cf617b08ed03ad7802d3a8775ac1385b3ea78. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SELAA8201020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13075e47f41bbbe86183b20a7df9aaf520e9b04b1e3e43750d62afd16275193f. 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/SELAA8201060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3144a998dd8ecc2044fa985b8234bc701c0c31ef02afc4405808e9b2a81376. 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/SELAA8101160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d575aa2dc52923304725c382423a9548fbf1edda0eab20f9fe3f9c9beb508c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SELAA8101402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544d76088146231454ea868a452888bc0fdfeefea3cb2afd2bceb8f0fedad19e. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/SELAA8002030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4d3c6968d44db76c2cf6b66d1d439b7eee5ff5cf68c5e2ec4e2d284370af72. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SELAA8002040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb942da2cf6aef75c2ba7bfe7844fc0d72fe7ca8dac9b7d9692d9fb25e325b89a. 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/SELAA8101405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa015ad5fbd80bad6a18fd4111a41a6aa5c204cfa9926079b87d1632702e6215a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:39:45Z), 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/SELAA8002060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f97c914bfebb1d61e5014b6f43a8355716a2fb3d68ce52e030f2d4e201e1865. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/SELAA8002070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821c7e40d83b4a132711d80b5a3114d7b94358ae0b741caa7d6d73af2ef3c26f. 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/SELAA8002080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2c543ba82b9d5bf2fb6d04812bfc1f219f6b569e64e986e55d48a7f79d280d. 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/SELAA8002120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f374e381ca26ca281ecb7336219d17a73335f54879af454de72ecf4a6bc6e3. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:35:12Z), 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/SELAA8002140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772df548a464fb14a1bf2e65ff31cf7042db8275af8dc59cdfc4cd7bed3419d0. 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/SELAA8101415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8eba67638c73735b58cd62dd612e1c7a0bb4ad7e93b43ef010661a12237718. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/SELAA8101416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f287ede8e9ebaa3150f8488e05cb37370781248ea8c91d065685ecf6bd55fa. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:35:20Z), 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/SELAA8101417.